Policy CSP - Defender

AllowArchiveScanning

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowArchiveScanning

This policy setting allows you to configure scans for malicious software and unwanted software in archive files such as .ZIP or .CAB files.

• If you enable or don't configure this setting, archive files will be scanned.

• If you disable this setting, archive files won't be scanned. However, archives are always scanned during directed scans.

Opomba

Changes to this setting are not applied when tamper protection is enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Not allowed. Turns off scanning on archived files.
1 (Default)	Allowed. Scans the archive files.

Group policy mapping:

Name	Value
Name	Scan_DisableArchiveScanning
Friendly Name	Scan archive files
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
Registry Value Name	DisableArchiveScanning
ADMX File Name	WindowsDefender.admx

AllowBehaviorMonitoring

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowBehaviorMonitoring

This policy setting allows you to configure behavior monitoring.

• If you enable or don't configure this setting, behavior monitoring will be enabled.

• If you disable this setting, behavior monitoring will be disabled.

Opomba

Changes to this setting are not applied when tamper protection is enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Not allowed. Turns off behavior monitoring.
1 (Default)	Allowed. Turns on real-time behavior monitoring.

Group policy mapping:

Name	Value
Name	RealtimeProtection_DisableBehaviorMonitoring
Friendly Name	Turn on behavior monitoring
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Real-time Protection
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Real-Time Protection
Registry Value Name	DisableBehaviorMonitoring
ADMX File Name	WindowsDefender.admx

AllowCloudProtection

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowCloudProtection

This policy setting allows you to join Microsoft MAPS. Microsoft MAPS is the online community that helps you choose how to respond to potential threats. The community also helps stop the spread of new malicious software infections.

You can choose to send basic or additional information about detected software. Additional information helps Microsoft create new security intelligence and help it to protect your computer. This information can include things like location of detected items on your computer if harmful software was removed. The information will be automatically collected and sent. In some instances, personal information might unintentionally be sent to Microsoft. However, Microsoft won't use this information to identify you or contact you.

Possible options are:

(0x0) Disabled (default) (0x1) Basic membership (0x2) Advanced membership.

Basic membership will send basic information to Microsoft about software that has been detected, including where the software came from, the actions that you apply or that are applied automatically, and whether the actions were successful.

Advanced membership, in addition to basic information, will send more information to Microsoft about malicious software, spyware, and potentially unwanted software, including the location of the software, file names, how the software operates, and how it has impacted your computer.

• If you enable this setting, you'll join Microsoft MAPS with the membership specified.

• If you disable or don't configure this setting, you won't join Microsoft MAPS.

In Windows 10, Basic membership is no longer available, so setting the value to 1 or 2 enrolls the device into Advanced membership.

Opomba

Changes to this setting are not applied when tamper protection is enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Not allowed. Turns off the Microsoft Active Protection Service.
1 (Default)	Allowed. Turns on the Microsoft Active Protection Service.

Group policy mapping:

Name	Value
Name	SpynetReporting
Friendly Name	Join Microsoft MAPS
Element Name	Join Microsoft MAPS.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > MAPS
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Spynet
ADMX File Name	WindowsDefender.admx

AllowEmailScanning

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowEmailScanning

This policy setting allows you to configure e-mail scanning. When e-mail scanning is enabled, the engine will parse the mailbox and mail files, according to their specific format, in order to analyze the mail bodies and attachments. Several e-mail formats are currently supported, for example: pst (Outlook), dbx, mbx, mime (Outlook Express), binhex (Mac). Email scanning isn't supported on modern email clients.

• If you enable this setting, e-mail scanning will be enabled.

• If you disable or don't configure this setting, e-mail scanning will be disabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Not allowed. Turns off email scanning.
1	Allowed. Turns on email scanning.

Group policy mapping:

Name	Value
Name	Scan_DisableEmailScanning
Friendly Name	Turn on e-mail scanning
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
Registry Value Name	DisableEmailScanning
ADMX File Name	WindowsDefender.admx

AllowFullScanOnMappedNetworkDrives

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowFullScanOnMappedNetworkDrives

This policy setting allows you to configure scanning mapped network drives.

• If you enable this setting, mapped network drives will be scanned.

• If you disable or don't configure this setting, mapped network drives won't be scanned.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Not allowed. Disables scanning on mapped network drives.
1	Allowed. Scans mapped network drives.

Group policy mapping:

Name	Value
Name	Scan_DisableScanningMappedNetworkDrivesForFullScan
Friendly Name	Run full scan on mapped network drives
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
Registry Value Name	DisableScanningMappedNetworkDrivesForFullScan
ADMX File Name	WindowsDefender.admx

AllowFullScanRemovableDriveScanning

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowFullScanRemovableDriveScanning

This policy setting allows you to manage whether or not to scan for malicious software and unwanted software in the contents of removable drives, such as USB flash drives, when running a full scan.

• If you enable this setting, removable drives will be scanned during any type of scan.

• If you disable or don't configure this setting, removable drives won't be scanned during a full scan. Removable drives may still be scanned during quick scan and custom scan.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Not allowed. Turns off scanning on removable drives.
1	Allowed. Scans removable drives.

Group policy mapping:

Name	Value
Name	Scan_DisableRemovableDriveScanning
Friendly Name	Scan removable drives
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
Registry Value Name	DisableRemovableDriveScanning
ADMX File Name	WindowsDefender.admx

AllowIntrusionPreventionSystem

Opomba

This policy is deprecated and may be removed in a future release.

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowIntrusionPreventionSystem

Allows or disallows Windows Defender Intrusion Prevention functionality.

Opomba

Changes to this setting are not applied when tamper protection is enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Not allowed.
1 (Default)	Allowed.

AllowIOAVProtection

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowIOAVProtection

This policy setting allows you to configure scanning for all downloaded files and attachments.

• If you enable or don't configure this setting, scanning for all downloaded files and attachments will be enabled.

• If you disable this setting, scanning for all downloaded files and attachments will be disabled.

Opomba

Changes to this setting are not applied when tamper protection is enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Not allowed.
1 (Default)	Allowed.

Group policy mapping:

Name	Value
Name	RealtimeProtection_DisableIOAVProtection
Friendly Name	Scan all downloaded files and attachments
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Real-time Protection
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Real-Time Protection
Registry Value Name	DisableIOAVProtection
ADMX File Name	WindowsDefender.admx

AllowOnAccessProtection

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowOnAccessProtection

This policy setting allows you to configure monitoring for file and program activity.

• If you enable or don't configure this setting, monitoring for file and program activity will be enabled.

• If you disable this setting, monitoring for file and program activity will be disabled.

Opomba

Changes to this setting are not applied when tamper protection is enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Not allowed.
1 (Default)	Allowed.

Group policy mapping:

Name	Value
Name	RealtimeProtection_DisableOnAccessProtection
Friendly Name	Monitor file and program activity on your computer
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Real-time Protection
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Real-Time Protection
Registry Value Name	DisableOnAccessProtection
ADMX File Name	WindowsDefender.admx

AllowRealtimeMonitoring

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowRealtimeMonitoring

Allows or disallows Windows Defender Realtime Monitoring functionality.

Opomba

Changes to this setting are not applied when tamper protection is enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Not allowed. Turns off the real-time monitoring service.
1 (Default)	Allowed. Turns on and runs the real-time monitoring service.

Group policy mapping:

Name	Value
Name	DisableRealtimeMonitoring
Friendly Name	Turn off real-time protection
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Real-time Protection
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Real-Time Protection
Registry Value Name	DisableRealtimeMonitoring
ADMX File Name	WindowsDefender.admx

AllowScanningNetworkFiles

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowScanningNetworkFiles

This policy setting allows you to configure scheduled scans and on-demand (manually initiated) scans for files that are accessed over the network. It is recommended to enable this setting.

Opomba

Real-time protection (on-access) scanning is not impacted by this policy.

• If you enable this setting or do not configure this setting, network files will be scanned.
• If you disable this setting, network files will not be scanned.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Not allowed. Turns off scanning of network files.
1	Allowed. Scans network files.

Group policy mapping:

Name	Value
Name	Scan_DisableScanningNetworkFiles
Friendly Name	Configure scanning of network files
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
Registry Value Name	DisableScanningNetworkFiles
ADMX File Name	WindowsDefender.admx

AllowScriptScanning

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowScriptScanning

Allows or disallows Windows Defender Script Scanning functionality.

Opomba

Changes to this setting are not applied when tamper protection is enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Not allowed.
1 (Default)	Allowed.

AllowUserUIAccess

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AllowUserUIAccess

This policy setting allows you to configure whether or not to display AM UI to the users.

If you enable this setting AM UI won't be available to users.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Not allowed. Prevents users from accessing UI.
1 (Default)	Allowed. Lets users access UI.

Group policy mapping:

Name	Value
Name	UX_Configuration_UILockdown
Friendly Name	Enable headless UI mode
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Client Interface
Registry Key Name	Software\Policies\Microsoft\Windows Defender\UX Configuration
Registry Value Name	UILockdown
ADMX File Name	WindowsDefender.admx

AttackSurfaceReductionOnlyExclusions

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1709 [10.0.16299] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AttackSurfaceReductionOnlyExclusions

Exclude files and paths from Attack Surface Reduction (ASR) rules.

Enabled:

Specify the folders or files and resources that should be excluded from ASR rules in the Options section.

Enter each rule on a new line as a name-value pair:

• Name column: Enter a folder path or a fully qualified resource name. For example, "C:\Windows" will exclude all files in that directory. "C:\Windows\App.exe" will exclude only that specific file in that specific folder
• Value column: Enter "0" for each item.

Disabled:

No exclusions will be applied to the ASR rules.

Not configured:

Same as Disabled.

You can configure ASR rules in the Configure Attack Surface Reduction rules GP setting.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace
Allowed Values	List (Delimiter: |)

Group policy mapping:

Name	Value
Name	ExploitGuard_ASR_ASROnlyExclusions
Friendly Name	Exclude files and paths from Attack Surface Reduction Rules
Element Name	Exclusions from ASR rules.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Microsoft Defender Exploit Guard > Attack Surface Reduction
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\ASR
ADMX File Name	WindowsDefender.admx

AttackSurfaceReductionRules

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1709 [10.0.16299] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AttackSurfaceReductionRules

Set the state for each Attack Surface Reduction (ASR) rule.

After enabling this setting, you can set each rule to the following in the Options section:

• Block: the rule will be applied
• Audit Mode: if the rule would normally cause an event, then it will be recorded (although the rule won't actually be applied)
• Off: the rule won't be applied
• Not Configured: the rule is enabled with default values
• Warn: the rule will be applied and the end-user will have the option to bypass the block.

Unless the ASR rule is disabled, a subsample of audit events are collected for ASR rules with the value of not configured.

Enabled:

Specify the state for each ASR rule under the Options section for this setting.

Enter each rule on a new line as a name-value pair:

• Name column: Enter a valid ASR rule ID
• Value column: Enter the status ID that relates to state you want to specify for the associated rule.

The following status IDs are permitted under the value column:

• 1 (Block)
• 0 (Off)
• 2 (Audit)
• 5 (Not Configured)
• 6 (Warn)

Example:

xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx 0 xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx 1 xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx 2

Disabled:

No ASR rules will be configured.

Not configured:

Same as Disabled.

You can exclude folders or files in the "Exclude files and paths from Attack Surface Reduction Rules" GP setting.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace

Group policy mapping:

Name	Value
Name	ExploitGuard_ASR_Rules
Friendly Name	Configure Attack Surface Reduction rules
Element Name	Set the state for each ASR rule.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Microsoft Defender Exploit Guard > Attack Surface Reduction
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\ASR
ADMX File Name	WindowsDefender.admx

AvgCPULoadFactor

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/AvgCPULoadFactor

This policy setting allows you to configure the maximum percentage CPU utilization permitted during a scan. Valid values for this setting are a percentage represented by the integers 5 to 100. A value of 0 indicates that there should be no throttling of CPU utilization. The default value is 50.

• If you enable this setting, CPU utilization won't exceed the percentage specified.

• If you disable or don't configure this setting, CPU utilization won't exceed the default value.

Opomba

If you enable both of the following policies, then Windows ignores the value of AvgCPULoadFactor:

• ScanOnlyIfIdle: Instructs the product to scan only when the computer isn't in use.
• DisableCpuThrottleOnIdleScans: Instructs the product to disable CPU throttling on idle scans.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Allowed Values	Range: [0-100]
Default Value	50

Group policy mapping:

Name	Value
Name	Scan_AvgCPULoadFactor
Friendly Name	Specify the maximum percentage of CPU utilization during a scan
Element Name	Specify the maximum percentage of CPU utilization during a scan.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
ADMX File Name	WindowsDefender.admx

CheckForSignaturesBeforeRunningScan

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1809 [10.0.17763] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/CheckForSignaturesBeforeRunningScan

This policy setting allows you to manage whether a check for new virus and spyware security intelligence will occur before running a scan.

This setting applies to scheduled scans, but it has no effect on scans initiated manually from the user interface or to the ones started from the command line using "mpcmdrun -Scan".

• If you enable this setting, a check for new security intelligence will occur before running a scan.

• If you disable this setting or don't configure this setting, the scan will start using the existing security intelligence.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Disabled.
1	Enabled.

Group policy mapping:

Name	Value
Name	CheckForSignaturesBeforeRunningScan
Friendly Name	Check for the latest virus and spyware security intelligence before running a scheduled scan
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
ADMX File Name	WindowsDefender.admx

CloudBlockLevel

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1709 [10.0.16299] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/CloudBlockLevel

This policy setting determines how aggressive Microsoft Defender Antivirus will be in blocking and scanning suspicious files.

If this setting is on, Microsoft Defender Antivirus will be more aggressive when identifying suspicious files to block and scan; otherwise, it will be less aggressive and therefore block and scan with less frequency.

For more information about specific values that are supported, see the Microsoft Defender Antivirus documentation site.

Opomba

This feature requires the "Join Microsoft MAPS" setting enabled in order to function.

Possible options are:

(0x0) Default Microsoft Defender Antivirus blocking level (0x1) Moderate Microsoft Defender Antivirus blocking level, delivers verdict only for high confidence detections (0x2) High blocking level - aggressively block unknowns while optimizing client performance (greater chance of false positives) (0x4) High+ blocking level - aggressively block unknowns and apply additional protection measures (may impact client performance) (0x6) Zero tolerance blocking level - block all unknown executables.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	NotConfigured.
2	High.
4	HighPlus.
6	ZeroTolerance.

Group policy mapping:

Name	Value
Name	MpEngine_MpCloudBlockLevel
Friendly Name	Select cloud protection level
Element Name	Select cloud blocking level.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > MpEngine
Registry Key Name	Software\Policies\Microsoft\Windows Defender\MpEngine
ADMX File Name	WindowsDefender.admx

CloudExtendedTimeout

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1709 [10.0.16299] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/CloudExtendedTimeout

This feature allows Microsoft Defender Antivirus to block a suspicious file for up to 60 seconds, and scan it in the cloud to make sure it's safe.

The typical cloud check timeout is 10 seconds. To enable the extended cloud check feature, specify the extended time in seconds, up to an additional 50 seconds.

For example, if the desired timeout is 60 seconds, specify 50 seconds in this setting, which will enable the extended cloud check feature, and will raise the total time to 60 seconds.

Opomba

This feature depends on three other MAPS settings - "Configure the 'Block at First Sight' feature; "Join Microsoft MAPS"; "Send file samples when further analysis is required" all need to be enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Allowed Values	Range: [0-50]
Default Value	0

Group policy mapping:

Name	Value
Name	MpEngine_MpBafsExtendedTimeout
Friendly Name	Configure extended cloud check
Element Name	Specify the extended cloud check time in seconds.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > MpEngine
Registry Key Name	Software\Policies\Microsoft\Windows Defender\MpEngine
ADMX File Name	WindowsDefender.admx

ControlledFolderAccessAllowedApplications

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1709 [10.0.16299] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ControlledFolderAccessAllowedApplications

Add additional applications that should be considered "trusted" by controlled folder access.

These applications are allowed to modify or delete files in controlled folder access folders.

Microsoft Defender Antivirus automatically determines which applications should be trusted. You can configure this setting to add additional applications.

Enabled:

Specify additional allowed applications in the Options section.

Disabled:

No additional applications will be added to the trusted list.

Not configured:

Same as Disabled.

You can enable controlled folder access in the Configure controlled folder access GP setting.

Default system folders are automatically guarded, but you can add folders in the configure protected folders GP setting.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace
Allowed Values	List (Delimiter: |)

Group policy mapping:

Name	Value
Name	ExploitGuard_ControlledFolderAccess_AllowedApplications
Friendly Name	Configure allowed applications
Element Name	Enter the applications that should be trusted.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Microsoft Defender Exploit Guard > Controlled Folder Access
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\Controlled Folder Access
ADMX File Name	WindowsDefender.admx

ControlledFolderAccessProtectedFolders

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1709 [10.0.16299] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ControlledFolderAccessProtectedFolders

Specify additional folders that should be guarded by the Controlled folder access feature.

Files in these folders can't be modified or deleted by untrusted applications.

Default system folders are automatically protected. You can configure this setting to add additional folders.

The list of default system folders that are protected is shown in Windows Security.

Enabled:

Specify additional folders that should be protected in the Options section.

Disabled:

No additional folders will be protected.

Not configured:

Same as Disabled.

You can enable controlled folder access in the Configure controlled folder access GP setting.

Microsoft Defender Antivirus automatically determines which applications can be trusted. You can add additional trusted applications in the Configure allowed applications GP setting.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace
Allowed Values	List (Delimiter: |)

Group policy mapping:

Name	Value
Name	ExploitGuard_ControlledFolderAccess_ProtectedFolders
Friendly Name	Configure protected folders
Element Name	Enter the folders that should be guarded.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Microsoft Defender Exploit Guard > Controlled Folder Access
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\Controlled Folder Access
ADMX File Name	WindowsDefender.admx

DaysToRetainCleanedMalware

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/DaysToRetainCleanedMalware

This policy setting defines the number of days items should be kept in the Quarantine folder before being removed.

• If you enable this setting, items will be removed from the Quarantine folder after the number of days specified.

• If you disable or don't configure this setting, items will be kept in the quarantine folder indefinitely and won't be automatically removed.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Allowed Values	Range: [0-90]
Default Value	0

Group policy mapping:

Name	Value
Name	Quarantine_PurgeItemsAfterDelay
Friendly Name	Configure removal of items from Quarantine folder
Element Name	Configure removal of items from Quarantine folder.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Quarantine
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Quarantine
ADMX File Name	WindowsDefender.admx

DisableCatchupFullScan

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1809 [10.0.17763] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/DisableCatchupFullScan

This policy setting allows you to configure catch-up scans for scheduled full scans. A catch-up scan is a scan that's initiated because a regularly scheduled scan was missed. Usually these scheduled scans are missed because the computer was turned off at the scheduled time.

• If you disable or don't configure this setting, catch-up scans for scheduled full scans will be turned on. If a computer is offline for two consecutive scheduled scans, a catch-up scan is started the next time someone logs on to the computer. If there is no scheduled scan configured, there will be no catch-up scan run.

• If you enable this setting, catch-up scans for scheduled full scans will be disabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Enabled.
1 (Default)	Disabled.

Group policy mapping:

Name	Value
Name	Scan_DisableCatchupFullScan
Friendly Name	Turn on catch-up full scan
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
ADMX File Name	WindowsDefender.admx

DisableCatchupQuickScan

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1809 [10.0.17763] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/DisableCatchupQuickScan

This policy setting allows you to configure catch-up scans for scheduled quick scans. A catch-up scan is a scan that's initiated because a regularly scheduled scan was missed. Usually these scheduled scans are missed because the computer was turned off at the scheduled time.

• If you disable or don't configure this setting, catch-up scans for scheduled quick scans will be turned on. If a computer is offline for two consecutive scheduled scans, a catch-up scan is started the next time someone logs on to the computer. If there is no scheduled scan configured, there will be no catch-up scan run.

• If you enable this setting, catch-up scans for scheduled quick scans will be disabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Enabled.
1 (Default)	Disabled.

Group policy mapping:

Name	Value
Name	Scan_DisableCatchupQuickScan
Friendly Name	Turn on catch-up quick scan
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
ADMX File Name	WindowsDefender.admx

EnableControlledFolderAccess

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1709 [10.0.16299] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/EnableControlledFolderAccess

Enable or disable controlled folder access for untrusted applications. You can choose to block, audit, or allow attempts by untrusted apps to:

• Modify or delete files in protected folders, such as the Documents folder
• Write to disk sectors.

You can also choose to only block or audit writes to disk sectors while still allowing the modification or deletion of files in protected folders.

Microsoft Defender Antivirus automatically determines which applications can be trusted. You can add additional trusted applications in the Configure allowed applications GP setting.

Default system folders are automatically protected, but you can add folders in the Configure protected folders GP setting.

Block:

The following will be blocked:

• Attempts by untrusted apps to modify or delete files in protected folders
• Attempts by untrusted apps to write to disk sectors.

The Windows event log will record these blocks under Applications and Services Logs > Microsoft > Windows > Windows Defender > Operational > ID 1123.

Disabled:

The following won't be blocked and will be allowed to run:

• Attempts by untrusted apps to modify or delete files in protected folders
• Attempts by untrusted apps to write to disk sectors.

These attempts won't be recorded in the Windows event log.

Audit Mode:

The following won't be blocked and will be allowed to run:

• Attempts by untrusted apps to modify or delete files in protected folders
• Attempts by untrusted apps to write to disk sectors.

The Windows event log will record these attempts under Applications and Services Logs > Microsoft > Windows > Windows Defender > Operational > ID 1124.

Block disk modification only:

The following will be blocked:

• Attempts by untrusted apps to write to disk sectors.

The Windows event log will record these attempts under Applications and Services Logs > Microsoft > Windows > Windows Defender > Operational > ID 1123.

The following won't be blocked and will be allowed to run:

• Attempts by untrusted apps to modify or delete files in protected folders.

These attempts won't be recorded in the Windows event log.

Audit disk modification only:

The following won't be blocked and will be allowed to run:

• Attempts by untrusted apps to write to disk sectors
• Attempts by untrusted apps to modify or delete files in protected folders.

Only attempts to write to protected disk sectors will be recorded in the Windows event log (under Applications and Services Logs > Microsoft > Windows > Windows Defender > Operational > ID 1124).

Attempts to modify or delete files in protected folders won't be recorded.

Not configured:

Same as Disabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Disabled.
1	Enabled.
2	Audit Mode.
3	Block disk modification only.
4	Audit disk modification only.

Group policy mapping:

Name	Value
Name	ExploitGuard_ControlledFolderAccess_EnableControlledFolderAccess
Friendly Name	Configure Controlled folder access
Element Name	Configure the guard my folders feature.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Microsoft Defender Exploit Guard > Controlled Folder Access
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\Controlled Folder Access
ADMX File Name	WindowsDefender.admx

EnableLowCPUPriority

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1809 [10.0.17763] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/EnableLowCPUPriority

This policy setting allows you to enable or disable low CPU priority for scheduled scans.

• If you enable this setting, low CPU priority will be used during scheduled scans.

• If you disable or don't configure this setting, not changes will be made to CPU priority for scheduled scans.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Disabled.
1	Enabled.

Group policy mapping:

Name	Value
Name	Scan_LowCpuPriority
Friendly Name	Configure low CPU priority for scheduled scans
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
ADMX File Name	WindowsDefender.admx

EnableNetworkProtection

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1709 [10.0.16299] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/EnableNetworkProtection

Enable or disable Microsoft Defender Exploit Guard network protection to prevent employees from using any application to access dangerous domains that may host phishing scams, exploit-hosting sites, and other malicious content on the Internet.

Enabled:

Specify the mode in the Options section:

-Block: Users and applications won't be able to access dangerous domains -Audit Mode: Users and applications can connect to dangerous domains, however if this feature would've blocked access if it were set to Block, then a record of the event will be in the event logs.

Disabled:

Users and applications won't be blocked from connecting to dangerous domains.

Not configured:

Same as Disabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Disabled.
1	Enabled (block mode).
2	Enabled (audit mode).

Group policy mapping:

Name	Value
Name	ExploitGuard_EnableNetworkProtection
Friendly Name	Prevent users and apps from accessing dangerous websites
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Microsoft Defender Exploit Guard > Network Protection
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\Network Protection
ADMX File Name	WindowsDefender.admx

ExcludedExtensions

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ExcludedExtensions

Allows an administrator to specify a list of file type extensions to ignore during a scan. Each file type in the list must be separated by a |. For example, lib|obj.

Opomba

To prevent unauthorized changes to exclusions, apply tamper protection. Tamper protection for exclusions only works when certain conditions are met.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace
Allowed Values	List (Delimiter: |)

Group policy mapping:

Name	Value
Name	Exclusions_Extensions
Friendly Name	Extension Exclusions
Element Name	Extension Exclusions.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Exclusions
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Exclusions
ADMX File Name	WindowsDefender.admx

ExcludedPaths

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ExcludedPaths

Allows an administrator to specify a list of directory paths to ignore during a scan. Each path in the list must be separated by a |. For example, C:\Example|C:\Example1.

Opomba

To prevent unauthorized changes to exclusions, apply tamper protection. Tamper protection for exclusions only works when certain conditions are met.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace
Allowed Values	List (Delimiter: |)

Group policy mapping:

Name	Value
Name	Exclusions_Paths
Friendly Name	Path Exclusions
Element Name	Path Exclusions.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Exclusions
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Exclusions
ADMX File Name	WindowsDefender.admx

ExcludedProcesses

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ExcludedProcesses

Allows an administrator to specify a list of files opened by processes to ignore during a scan.

Pomembno

The process itself isn't excluded from the scan, but can be by using the Defender/ExcludedPaths policy to exclude its path. Each file type must be separated by a |. For example, C:\Example. exe|C:\Example1.exe.

Opomba

To prevent unauthorized changes to exclusions, apply tamper protection. Tamper protection for exclusions only works when certain conditions are met.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace
Allowed Values	List (Delimiter: |)

Group policy mapping:

Name	Value
Name	Exclusions_Processes
Friendly Name	Process Exclusions
Element Name	Process Exclusions.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Exclusions
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Exclusions
ADMX File Name	WindowsDefender.admx

PUAProtection

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/PUAProtection

Enable or disable detection for potentially unwanted applications. You can choose to block, audit, or allow when potentially unwanted software is being downloaded or attempts to install itself on your computer.

Enabled:

Specify the mode in the Options section:

-Block: Potentially unwanted software will be blocked.

-Audit Mode: Potentially unwanted software won't be blocked, however if this feature would've blocked access if it were set to Block, then a record of the event will be in the event logs.

Disabled:

Potentially unwanted software won't be blocked.

Not configured:

Same as Disabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	PUA Protection off. Windows Defender won't protect against potentially unwanted applications.
1	PUA Protection on. Detected items are blocked. They will show in history along with other threats.
2	Audit mode. Windows Defender will detect potentially unwanted applications, but take no action. You can review information about the applications Windows Defender would've taken action against by searching for events created by Windows Defender in the Event Viewer.

Group policy mapping:

Name	Value
Name	Root_PUAProtection
Friendly Name	Configure detection for potentially unwanted applications
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus
Registry Key Name	Software\Policies\Microsoft\Windows Defender
ADMX File Name	WindowsDefender.admx

RealTimeScanDirection

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/RealTimeScanDirection

This policy setting allows you to configure monitoring for incoming and outgoing files, without having to turn off monitoring entirely. It's recommended for use on servers where there is a lot of incoming and outgoing file activity but for performance reasons need to have scanning disabled for a particular scan direction. The appropriate configuration should be evaluated based on the server role.

Note that this configuration is only honored for NTFS volumes. For any other file system type, full monitoring of file and program activity will be present on those volumes.

The options for this setting are mutually exclusive:

0 = Scan incoming and outgoing files (default) 1 = Scan incoming files only 2 = Scan outgoing files only.

Any other value, or if the value doesn't exist, resolves to the default (0).

• If you enable this setting, the specified type of monitoring will be enabled.

• If you disable or don't configure this setting, monitoring for incoming and outgoing files will be enabled.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Monitor all files (bi-directional).
1	Monitor incoming files.
2	Monitor outgoing files.

Group policy mapping:

Name	Value
Name	RealtimeProtection_RealtimeScanDirection
Friendly Name	Configure monitoring for incoming and outgoing file and program activity
Element Name	Configure monitoring for incoming and outgoing file and program activity.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Real-time Protection
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Real-Time Protection
ADMX File Name	WindowsDefender.admx

ScanParameter

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ScanParameter

This policy setting allows you to specify the scan type to use during a scheduled scan. Scan type options are:

1 = Quick Scan (default) 2 = Full Scan.

• If you enable this setting, the scan type will be set to the specified value.

• If you disable or don't configure this setting, the default scan type will be used.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
1 (Default)	Quick scan.
2	Full scan.

Group policy mapping:

Name	Value
Name	Scan_ScanParameters
Friendly Name	Specify the scan type to use for a scheduled scan
Element Name	Specify the scan type to use for a scheduled scan.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
ADMX File Name	WindowsDefender.admx

ScheduleQuickScanTime

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ScheduleQuickScanTime

This policy setting allows you to specify the time of day at which to perform a daily quick scan. The time value is represented as the number of minutes past midnight (00:00). For example, 120 (0x78) is equivalent to 02:00 AM. By default, this setting is set to disabled. The schedule is based on local time on the computer where the scan is executing.

• If you enable this setting, a daily quick scan will run at the time of day specified.

• If you disable or don't configure this setting, daily quick scan controlled by this config won't be run.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Allowed Values	Range: [0-1380]
Default Value	120

Group policy mapping:

Name	Value
Name	Scan_ScheduleQuickScantime
Friendly Name	Specify the time for a daily quick scan
Element Name	Specify the time for a daily quick scan.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
ADMX File Name	WindowsDefender.admx

ScheduleScanDay

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ScheduleScanDay

This policy setting allows you to specify the day of the week on which to perform a scheduled scan. The scan can also be configured to run every day or to never run at all.

This setting can be configured with the following ordinal number values:

(0x0) Every Day (0x1) Sunday (0x2) Monday (0x3) Tuesday (0x4) Wednesday (0x5) Thursday (0x6) Friday (0x7) Saturday (0x8) Never (default)

• If you enable this setting, a scheduled scan will run at the frequency specified.

• If you disable or don't configure this setting, a scheduled scan will run at a default frequency.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	0

Allowed values:

Value	Description
0 (Default)	Every day.
1	Sunday.
2	Monday.
3	Tuesday.
4	Wednesday.
5	Thursday.
6	Friday.
7	Saturday.
8	No scheduled scan.

Group policy mapping:

Name	Value
Name	Scan_ScheduleDay
Friendly Name	Specify the day of the week to run a scheduled scan
Element Name	Specify the day of the week to run a scheduled scan.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
ADMX File Name	WindowsDefender.admx

ScheduleScanTime

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ScheduleScanTime

This policy setting allows you to specify the time of day at which to perform a scheduled scan. The time value is represented as the number of minutes past midnight (00:00). For example, 120 (0x78) is equivalent to 02:00 AM. By default, this setting is set to a time value of 2:00 AM. The schedule is based on local time on the computer where the scan is executing.

• If you enable this setting, a scheduled scan will run at the time of day specified.

• If you disable or don't configure this setting, a scheduled scan will run at a default time.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Allowed Values	Range: [0-1380]
Default Value	120

Group policy mapping:

Name	Value
Name	Scan_ScheduleTime
Friendly Name	Specify the time of day to run a scheduled scan
Element Name	Specify the time of day to run a scheduled scan.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Scan
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Scan
ADMX File Name	WindowsDefender.admx

SecurityIntelligenceLocation

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1903 [10.0.18362] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/SecurityIntelligenceLocation

This policy setting allows you to define the security intelligence location for VDI-configured computers.

If you disable or don't configure this setting, security intelligence will be referred from the default local source.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace

Group policy mapping:

Name	Value
Name	SignatureUpdate_SharedSignaturesLocation
Friendly Name	Define security intelligence location for VDI clients.
Element Name	Define file share for downloading security intelligence updates in virtual environments.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Security Intelligence Updates
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Signature Updates
ADMX File Name	WindowsDefender.admx

SignatureUpdateFallbackOrder

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1809 [10.0.17763] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/SignatureUpdateFallbackOrder

This policy setting allows you to define the order in which different security intelligence update sources should be contacted. The value of this setting should be entered as a pipe-separated string enumerating the security intelligence update sources in order. Possible values are: "InternalDefinitionUpdateServer", "MicrosoftUpdateServer", "MMPC", and "FileShares".

For Example: { InternalDefinitionUpdateServer | MicrosoftUpdateServer | MMPC }

• If you enable this setting, security intelligence update sources will be contacted in the order specified. Once security intelligence updates have been successfully downloaded from one specified source, the remaining sources in the list won't be contacted.

• If you disable or don't configure this setting, security intelligence update sources will be contacted in a default order.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace
Allowed Values	List (Delimiter: |)

Group policy mapping:

Name	Value
Name	SignatureUpdate_FallbackOrder
Friendly Name	Define the order of sources for downloading security intelligence updates
Element Name	Define the order of sources for downloading security intelligence updates.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Security Intelligence Updates
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Signature Updates
ADMX File Name	WindowsDefender.admx

SignatureUpdateFileSharesSources

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1809 [10.0.17763] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/SignatureUpdateFileSharesSources

This policy setting allows you to configure UNC file share sources for downloading security intelligence updates. Sources will be contacted in the order specified. The value of this setting should be entered as a pipe-separated string enumerating the security intelligence update sources. For example: "{\\unc1 | \\unc2 }". The list is empty by default.

• If you enable this setting, the specified sources will be contacted for security intelligence updates. Once security intelligence updates have been successfully downloaded from one specified source, the remaining sources in the list won't be contacted.

• If you disable or don't configure this setting, the list will remain empty by default and no sources will be contacted.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace
Allowed Values	List (Delimiter: |)

Group policy mapping:

Name	Value
Name	SignatureUpdate_DefinitionUpdateFileSharesSources
Friendly Name	Define file shares for downloading security intelligence updates
Element Name	Define file shares for downloading security intelligence updates.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Security Intelligence Updates
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Signature Updates
ADMX File Name	WindowsDefender.admx

SignatureUpdateInterval

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/SignatureUpdateInterval

This policy setting allows you to specify an interval at which to check for security intelligence updates. The time value is represented as the number of hours between update checks. Valid values range from 1 (every hour) to 24 (once per day).

• If you enable this setting, checks for security intelligence updates will occur at the interval specified.

• If you disable or don't configure this setting, checks for security intelligence updates will occur at the default interval.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Allowed Values	Range: [0-24]
Default Value	8

Group policy mapping:

Name	Value
Name	SignatureUpdate_SignatureUpdateInterval
Friendly Name	Specify the interval to check for security intelligence updates
Element Name	Specify the interval to check for security intelligence updates.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Security Intelligence Updates
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Signature Updates
ADMX File Name	WindowsDefender.admx

SubmitSamplesConsent

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1507 [10.0.10240] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/SubmitSamplesConsent

This policy setting configures behavior of samples submission when opt-in for MAPS telemetry is set.

Possible options are:

(0x0) Always prompt (0x1) Send safe samples automatically (0x2) Never send (0x3) Send all samples automatically.

Description framework properties:

Property name	Property value
Format	int
Access Type	Add, Delete, Get, Replace
Default Value	1

Allowed values:

Value	Description
0	Always prompt.
1 (Default)	Send safe samples automatically.
2	Never send.
3	Send all samples automatically.

Group policy mapping:

Name	Value
Name	SubmitSamplesConsent
Friendly Name	Send file samples when further analysis is required
Element Name	Send file samples when further analysis is required.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > MAPS
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Spynet
ADMX File Name	WindowsDefender.admx

ThreatSeverityDefaultAction

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 1607 [10.0.14393] and later

Device

./Device/Vendor/MSFT/Policy/Config/Defender/ThreatSeverityDefaultAction

This policy setting allows you to customize which automatic remediation action will be taken for each threat alert level. Threat alert levels should be added under the Options for this setting. Each entry must be listed as a name value pair. The name defines a threat alert level. The value contains the action ID for the remediation action that should be taken.

Valid threat alert levels are:

1 = Low 2 = Medium 4 = High 5 = Severe.

Valid remediation action values are:

2 = Quarantine 3 = Remove 6 = Ignore.

Opomba

Changes to this setting are not applied when tamper protection is enabled.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace

Group policy mapping:

Name	Value
Name	Threats_ThreatSeverityDefaultAction
Friendly Name	Specify threat alert levels at which default action should not be taken when detected
Element Name	Specify threat alert levels at which default action shouldn't be taken when detected.
Location	Computer Configuration
Path	Windows Components > Microsoft Defender Antivirus > Threats
Registry Key Name	Software\Policies\Microsoft\Windows Defender\Threats
ADMX File Name	WindowsDefender.admx

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