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Query Update Management logs

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Important

Automation Update Management has retired on 31 August 2024 and we recommend that you use Azure Update Manager. Follow the guidelines for migration from Automation Update Management to Azure Update Manager.

In addition to the details that are provided during Update Management deployment, you can search the logs stored in your Log Analytics workspace. To search the logs from your Automation account, select Update management and open the Log Analytics workspace associated with your deployment.

You can also customize the log queries or use them from different clients. See Log Analytics search API documentation.

Query update records

Update Management collects records for Windows and Linux VMs and the data types that appear in log search results. The following sections describe those records.

Query Update record

A record with a type of Update is created that represents updates available and their installation status for a machine. These records have the properties in the following table:

Property Description
TenantId Unique identifier representing your organization's instance of Microsoft Entra ID.
SourceSystem The source system for the record. The value is OperationsManager.
TimeGenerated Date and time of record creation.
SourceComputerId Unique identifier representing the source computer.
Title The title of the update.
Classification Approval classification. The value is Updates.
PublishedDate (UTC) The date when the update is ready to be downloaded and installed from Windows Update.
Computer Fully-qualified domain name of reporting machine.
UpdateState The current state of the update.
Product The products for which the update is applicable.
OSType Type of operating system. Values are Windows or Linux.
ProductVersion Version of the update.
Product Arch Applicable machine architecture
CVENumbers Common Vulnerabilities and Exposures number
BulletinUrl URL of the Bulletin
BulletinID Bulletin ID number.
PackageRepository Repository info of the package.
PackageSeverity Severity of the update.
OSName Type of operating system. Values are Windows or Linux.
OSVersion The version of the operating system.
OSFullName Name of operating system.
SubscriptionId Unique identifier for the Azure subscription.
ResourceGroup Name of the resource group to which the resource belongs.
ResourceProvider The resource provider.
Resource Name of the resource.
ResourceId Unique identifier for the resource associated with the record.
ResourceType The resource type.
ComputerEnvironment Environment. Possible values are Azure or Non-Azure.
VMUUID Unique identifier for the virtual machine.
MG Unique identifier for the management group or Log Analytics workspace.
ManagementGroupName Name of the Operations Manager management group or the Log Analytics workspace.
MSRCSeverity Severity rating for the vulnerability. Values are:
Critical
Important
Moderate
Low
KBID Knowledge base article ID for the Windows update.
UpdateID Unique identifier of the software update.
RevisionNumber The revision number of a specific revision of an update.
Optional True if the record is optional, or False otherwise.
RebootBehavior The reboot behavior after installing/uninstalling an update.
MSRCBulletinID Security bulletin ID number.
Approved True if the record is approved, or False otherwise.
ApprovalSource Applies to Windows operating system only. Source of approval for the record. The value is Microsoft Update.
InstallTimePredictionSeconds
InstallTimeDeviationRangeSeconds
InstallTimeAvailable
Type Record type. The value is Update.

Query Update Deployment Status record

A record with a type of UpdateRunProgress is created that provides update deployment status of a scheduled deployment by machine. These records have the properties in the following table:

Property Description
TenantId Unique identifier representing your organization's instance of Microsoft Entra ID.
SourceSystem Source system for the record. The value is OperationsManager.
TimeGenerated Date and time of record creation.
MG Unique identifier for the management group or Log Analytics workspace.
ManagementGroupName Name of the Operations Manager management group or Log Analytics workspace.
SourceComputerId Unique identifier representing the source computer.
KBID Knowledge base article ID for the Windows update.
UpdateId Unique identifier of the software update.
SucceededOnRetry Value indicating if the update execution failed on the first attempt and the current operation is a retry attempt.
ErrorResult Windows Update error code generated if an update fails to install.
UpdateRunName Name of the update schedule.
InstallationStatus The possible installation states of an update on the client computer,
NotStarted - job not triggered yet.
Failed - job started but failed with an exception.
InProgress - job in progress.
MaintenanceWindowExceeded - if execution was remaining but maintenance window interval reached.
Succeeded - job succeeded.
Install Failed - update failed to install successfully.
NotIncluded - the corresponding update's classification doesn't match with customer's entries in input classification list.
Excluded - user enters a KBID in excluded list. While patching, if KBID in excluded list matches with the system detected update KB ID, it is marked as excluded.
Computer Fully-qualified domain name of reporting machine.
Title The title of the update.
Product The products for which the update is applicable.
OSType Type of operating system. Values are Windows or Linux.
StartTime (UTC) Time when the update is scheduled to be installed. This property is currently not used. See TimeGenerated.
EndTime (UTC) The time when the synchronization process ended. This property is currently not used. See TimeGenerated.
CorrelationId Unique identifier of the runbook job run for the update.
SubscriptionId Unique identifier for the Azure subscription.
ResourceGroup Name of the resource group to which the resource belongs.
ResourceProvider The resource provider.
Resource Name of the resource.
ResourceId Unique identifier for the resource associated with the record.
ResourceType Resource type.
ComputerEnvironment Environment. Values are Azure or Non-Azure.
VMUUID Unique identifier for the virtual machine.
Type The type of update. The value is UpdateRunProgress.
_ResourceId Unique identifier for the resource associated with the record.

Query Update Summary record

A record with a type of UpdateSummary is created that provides update summary by machine. These records have the properties in the following table:

Property Description
TenantId Unique identifier representing your organization's instance of Microsoft Entra ID.
SourceSystem Source system for the record. The value is OpsManager.
TimeGenerated Date and time of record creation.
MG Unique identifier for the management group or Log Analytics workspace.
ManagementGroupName Name of the Operations Manager management group or Log Analytics workspace.
SourceComputerId Unique identifier for the virtual machine.
LastUpdateApplied (UTC)
OldestMissingSecurityUpdateInDays Total number of days for the oldest update detected as applicable that has not been installed.
OldestMissingSecurityUpdateBucket Specifier of the oldest missing security bucket. Values are:
Recent if value is less than 30 days
30 days ago
60 days ago
90 days ago
120 days ago
150 days ago
180 days ago
Older when value is greater than 180 days.
WindowsUpdateSetting Status of the Windows Update agent. Possible values are:
Scheduled installation
Notify before installation
Error returned from unhealthy WUA agent
WindowsUpdateAgentVersion Version of the Windows Update agent.
WSUSServer Errors if the Windows Update agent has a problem, to assist with troubleshooting.
Computer Fully-qualified domain name of reporting machine.
OsVersion The version of the operating system.
NETRuntimeVersion Version of .NET Framework installed on the Windows computer.
CriticalUpdatesMissing Number of applicable critical updates that are missing.
SecurityUpdatesMissing Count of missing security updates that are applicable.
OtherUpdatesMissing Count of detected updates missing.
TotalUpdatesMissing Total number of missing updates that are applicable.
RestartPending True if a restart is pending, or False otherwise.
SubscriptionId Unique identifier for the Azure subscription.
ResourceGroup Name of the resource group containing the resource.
ResourceProvider The resource provider.
Resource Name of the resource for the record.
ResourceId Unique identifier for the resource associated with the record.
ResourceType Resource type.
ComputerEnvironment Environment. Values are Azure or Non-Azure.
VMUUID Unique identifier for the virtual machine.
Type Record type. The value is UpdateSummary.
_ResourceId Unique identifier for the resource associated with the record.

Sample queries

The following sections provide sample log queries for update records that are collected for Update Management.

Confirm that non-Azure machines are enabled for Update Management

To confirm that directly connected machines are communicating with Azure Monitor logs, run one of the following log searches.

Linux

Heartbeat
| where OSType == "Linux" | summarize arg_max(TimeGenerated, *) by SourceComputerId | top 500000 by Computer asc | render table

Windows

Heartbeat
| where OSType == "Windows" | summarize arg_max(TimeGenerated, *) by SourceComputerId | top 500000 by Computer asc | render table

On a Windows computer, you can review the following information to verify agent connectivity with Azure Monitor logs:

  1. In Control Panel, open Microsoft Monitoring Agent. On the Azure Log Analytics tab, the agent displays the following message: The Microsoft Monitoring Agent has successfully connected to Log Analytics.

  2. Open the Windows Event Log. Go to Application and Services Logs\Operations Manager and search for Event ID 3000 and Event ID 5002 from the source Service Connector. These events indicate that the computer has registered with the Log Analytics workspace and is receiving configuration.

If the agent can't communicate with Azure Monitor logs and the agent is configured to communicate with the internet through a firewall or proxy server, confirm the firewall or proxy server is properly configured. To learn how to verify the firewall or proxy server is properly configured, see Network configuration for Windows agent or Network configuration for Linux agent.

Note

If your Linux systems are configured to communicate with a proxy or Log Analytics Gateway and you're enabling Update Management, update the proxy.conf permissions to grant the omiuser group read permission on the file by using the following commands:

sudo chown omsagent:omiusers /etc/opt/microsoft/omsagent/proxy.conf sudo chmod 644 /etc/opt/microsoft/omsagent/proxy.conf

Newly added Linux agents show a status of Updated after an assessment has been performed. This process can take up to 6 hours.

To confirm that an Operations Manager management group is communicating with Azure Monitor logs, see Validate Operations Manager integration with Azure Monitor logs.

Single Azure VM Assessment queries (Windows)

Replace the VMUUID value with the VM GUID of the virtual machine you're querying. You can find the VMUUID that should be used by running the following query in Azure Monitor logs: Update | where Computer == "<machine name>" | summarize by Computer, VMUUID

Missing updates summary

Update
| where TimeGenerated>ago(14h) and OSType!="Linux" and (Optional==false or Classification has "Critical" or Classification has "Security") and VMUUID=~"b08d5afa-1471-4b52-bd95-a44fea6e4ca8"
| summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification, Approved) by Computer, SourceComputerId, UpdateID
| where UpdateState=~"Needed" and Approved!=false
| summarize by UpdateID, Classification
| summarize allUpdatesCount=count(), criticalUpdatesCount=countif(Classification has "Critical"), securityUpdatesCount=countif(Classification has "Security"), otherUpdatesCount=countif(Classification !has "Critical" and Classification !has "Security")

Missing updates list

Update
| where TimeGenerated>ago(14h) and OSType!="Linux" and (Optional==false or Classification has "Critical" or Classification has "Security") and VMUUID=~"8bf1ccc6-b6d3-4a0b-a643-23f346dfdf82"
| summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification, Title, KBID, PublishedDate, Approved) by Computer, SourceComputerId, UpdateID
| where UpdateState=~"Needed" and Approved!=false
| project-away UpdateState, Approved, TimeGenerated
| summarize computersCount=dcount(SourceComputerId, 2), displayName=any(Title), publishedDate=min(PublishedDate), ClassificationWeight=max(iff(Classification has "Critical", 4, iff(Classification has "Security", 2, 1))) by id=strcat(UpdateID, "_", KBID), classification=Classification, InformationId=strcat("KB", KBID), InformationUrl=iff(isnotempty(KBID), strcat("https://support.microsoft.com/kb/", KBID), ""), osType=2
| sort by ClassificationWeight desc, computersCount desc, displayName asc
| extend informationLink=(iff(isnotempty(InformationId) and isnotempty(InformationUrl), toobject(strcat('{ "uri": "', InformationUrl, '", "text": "', InformationId, '", "target": "blank" }')), toobject('')))
| project-away ClassificationWeight, InformationId, InformationUrl

Single Azure VM assessment queries (Linux)

For some Linux distros, there is an endianness mismatch with the VMUUID value that comes from Azure Resource Manager and what is stored in Azure Monitor logs. The following query checks for a match on either endianness. Replace the VMUUID values with the big-endian and little-endian format of the GUID to properly return the results. You can find the VMUUID that should be used by running the following query in Azure Monitor logs: Update | where Computer == "<machine name>" | summarize by Computer, VMUUID

Missing updates summary

Update
| where TimeGenerated>ago(5h) and OSType=="Linux" and (VMUUID=~"625686a0-6d08-4810-aae9-a089e68d4911" or VMUUID=~"a0865662-086d-1048-aae9-a089e68d4911")
| summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification) by Computer, SourceComputerId, Product, ProductArch
| where UpdateState=~"Needed"
| summarize by Product, ProductArch, Classification
| summarize allUpdatesCount=count(), criticalUpdatesCount=countif(Classification has "Critical"), securityUpdatesCount=countif(Classification has "Security"), otherUpdatesCount=countif(Classification !has "Critical" and Classification !has "Security")

Missing updates list

Update
| where TimeGenerated>ago(5h) and OSType=="Linux" and (VMUUID=~"625686a0-6d08-4810-aae9-a089e68d4911" or VMUUID=~"a0865662-086d-1048-aae9-a089e68d4911")
| summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification, BulletinUrl, BulletinID) by Computer, SourceComputerId, Product, ProductArch
| where UpdateState=~"Needed"
| project-away UpdateState, TimeGenerated
| summarize computersCount=dcount(SourceComputerId, 2), ClassificationWeight=max(iff(Classification has "Critical", 4, iff(Classification has "Security", 2, 1))) by id=strcat(Product, "_", ProductArch), displayName=Product, productArch=ProductArch, classification=Classification, InformationId=BulletinID, InformationUrl=tostring(split(BulletinUrl, ";", 0)[0]), osType=1
| sort by ClassificationWeight desc, computersCount desc, displayName asc
| extend informationLink=(iff(isnotempty(InformationId) and isnotempty(InformationUrl), toobject(strcat('{ "uri": "', InformationUrl, '", "text": "', InformationId, '", "target": "blank" }')), toobject('')))
| project-away ClassificationWeight, InformationId, InformationUrl

Multi-VM assessment queries

Computers summary

Heartbeat
| where TimeGenerated>ago(12h) and OSType=~"Windows" and notempty(Computer)
| summarize arg_max(TimeGenerated, Solutions) by SourceComputerId
| where Solutions has "updates"
| distinct SourceComputerId
| join kind=leftouter
(
    Update
    | where TimeGenerated>ago(14h) and OSType!="Linux"
    | summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Approved, Optional, Classification) by SourceComputerId, UpdateID
    | distinct SourceComputerId, Classification, UpdateState, Approved, Optional
    | summarize WorstMissingUpdateSeverity=max(iff(UpdateState=~"Needed" and (Optional==false or Classification has "Critical" or Classification has "Security") and Approved!=false, iff(Classification has "Critical", 4, iff(Classification has "Security", 2, 1)), 0)) by SourceComputerId
)
on SourceComputerId
| extend WorstMissingUpdateSeverity=coalesce(WorstMissingUpdateSeverity, -1)
| summarize computersBySeverity=count() by WorstMissingUpdateSeverity
| union (Heartbeat
| where TimeGenerated>ago(12h) and OSType=="Linux" and notempty(Computer)
| summarize arg_max(TimeGenerated, Solutions) by SourceComputerId
| where Solutions has "updates"
| distinct SourceComputerId
| join kind=leftouter
(
    Update
    | where TimeGenerated>ago(5h) and OSType=="Linux"
    | summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification) by SourceComputerId, Product, ProductArch
    | distinct SourceComputerId, Classification, UpdateState
    | summarize WorstMissingUpdateSeverity=max(iff(UpdateState=~"Needed", iff(Classification has "Critical", 4, iff(Classification has "Security", 2, 1)), 0)) by SourceComputerId
)
on SourceComputerId
| extend WorstMissingUpdateSeverity=coalesce(WorstMissingUpdateSeverity, -1)
| summarize computersBySeverity=count() by WorstMissingUpdateSeverity)
| summarize assessedComputersCount=sumif(computersBySeverity, WorstMissingUpdateSeverity>-1), notAssessedComputersCount=sumif(computersBySeverity, WorstMissingUpdateSeverity==-1), computersNeedCriticalUpdatesCount=sumif(computersBySeverity, WorstMissingUpdateSeverity==4), computersNeedSecurityUpdatesCount=sumif(computersBySeverity, WorstMissingUpdateSeverity==2), computersNeedOtherUpdatesCount=sumif(computersBySeverity, WorstMissingUpdateSeverity==1), upToDateComputersCount=sumif(computersBySeverity, WorstMissingUpdateSeverity==0)
| summarize assessedComputersCount=sum(assessedComputersCount), computersNeedCriticalUpdatesCount=sum(computersNeedCriticalUpdatesCount),  computersNeedSecurityUpdatesCount=sum(computersNeedSecurityUpdatesCount), computersNeedOtherUpdatesCount=sum(computersNeedOtherUpdatesCount), upToDateComputersCount=sum(upToDateComputersCount), notAssessedComputersCount=sum(notAssessedComputersCount)
| extend allComputersCount=assessedComputersCount+notAssessedComputersCount

Missing updates summary

Update
| where TimeGenerated>ago(5h) and OSType=="Linux" and SourceComputerId in ((Heartbeat
| where TimeGenerated>ago(12h) and OSType=="Linux" and notempty(Computer)
| summarize arg_max(TimeGenerated, Solutions) by SourceComputerId
| where Solutions has "updates"
| distinct SourceComputerId))
| summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification) by Computer, SourceComputerId, Product, ProductArch
| where UpdateState=~"Needed"
| summarize by Product, ProductArch, Classification
| union (Update
| where TimeGenerated>ago(14h) and OSType!="Linux" and (Optional==false or Classification has "Critical" or Classification has "Security") and SourceComputerId in ((Heartbeat
| where TimeGenerated>ago(12h) and OSType=~"Windows" and notempty(Computer)
| summarize arg_max(TimeGenerated, Solutions) by SourceComputerId
| where Solutions has "updates"
| distinct SourceComputerId))
| summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification, Approved) by Computer, SourceComputerId, UpdateID
| where UpdateState=~"Needed" and Approved!=false
| summarize by UpdateID, Classification )
| summarize allUpdatesCount=count(), criticalUpdatesCount=countif(Classification has "Critical"), securityUpdatesCount=countif(Classification has "Security"), otherUpdatesCount=countif(Classification !has "Critical" and Classification !has "Security")

Computers list

Heartbeat
| where TimeGenerated>ago(12h) and OSType=="Linux" and notempty(Computer)
| summarize arg_max(TimeGenerated, Solutions, Computer, ResourceId, ComputerEnvironment, VMUUID) by SourceComputerId
| where Solutions has "updates"
| extend vmuuId=VMUUID, azureResourceId=ResourceId, osType=1, environment=iff(ComputerEnvironment=~"Azure", 1, 2), scopedToUpdatesSolution=true, lastUpdateAgentSeenTime=""
| join kind=leftouter
(
    Update
    | where TimeGenerated>ago(5h) and OSType=="Linux" and SourceComputerId in ((Heartbeat
    | where TimeGenerated>ago(12h) and OSType=="Linux" and notempty(Computer)
    | summarize arg_max(TimeGenerated, Solutions) by SourceComputerId
    | where Solutions has "updates"
    | distinct SourceComputerId))
    | summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification, Product, Computer, ComputerEnvironment) by SourceComputerId, Product, ProductArch
    | summarize Computer=any(Computer), ComputerEnvironment=any(ComputerEnvironment), missingCriticalUpdatesCount=countif(Classification has "Critical" and UpdateState=~"Needed"), missingSecurityUpdatesCount=countif(Classification has "Security" and UpdateState=~"Needed"), missingOtherUpdatesCount=countif(Classification !has "Critical" and Classification !has "Security" and UpdateState=~"Needed"), lastAssessedTime=max(TimeGenerated), lastUpdateAgentSeenTime="" by SourceComputerId
    | extend compliance=iff(missingCriticalUpdatesCount > 0 or missingSecurityUpdatesCount > 0, 2, 1)
    | extend ComplianceOrder=iff(missingCriticalUpdatesCount > 0 or missingSecurityUpdatesCount > 0 or missingOtherUpdatesCount > 0, 1, 3)
)
on SourceComputerId
| project id=SourceComputerId, displayName=Computer, sourceComputerId=SourceComputerId, scopedToUpdatesSolution=true, missingCriticalUpdatesCount=coalesce(missingCriticalUpdatesCount, -1), missingSecurityUpdatesCount=coalesce(missingSecurityUpdatesCount, -1), missingOtherUpdatesCount=coalesce(missingOtherUpdatesCount, -1), compliance=coalesce(compliance, 4), lastAssessedTime, lastUpdateAgentSeenTime, osType=1, environment=iff(ComputerEnvironment=~"Azure", 1, 2), ComplianceOrder=coalesce(ComplianceOrder, 2)
| union(Heartbeat
| where TimeGenerated>ago(12h) and OSType=~"Windows" and notempty(Computer)
| summarize arg_max(TimeGenerated, Solutions, Computer, ResourceId, ComputerEnvironment, VMUUID) by SourceComputerId
| where Solutions has "updates"
| extend vmuuId=VMUUID, azureResourceId=ResourceId, osType=2, environment=iff(ComputerEnvironment=~"Azure", 1, 2), scopedToUpdatesSolution=true, lastUpdateAgentSeenTime=""
| join kind=leftouter
(
    Update
    | where TimeGenerated>ago(14h) and OSType!="Linux" and SourceComputerId in ((Heartbeat
    | where TimeGenerated>ago(12h) and OSType=~"Windows" and notempty(Computer)
    | summarize arg_max(TimeGenerated, Solutions) by SourceComputerId
    | where Solutions has "updates"
    | distinct SourceComputerId))
    | summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification, Title, Optional, Approved, Computer, ComputerEnvironment) by Computer, SourceComputerId, UpdateID
    | summarize Computer=any(Computer), ComputerEnvironment=any(ComputerEnvironment), missingCriticalUpdatesCount=countif(Classification has "Critical" and UpdateState=~"Needed" and Approved!=false), missingSecurityUpdatesCount=countif(Classification has "Security" and UpdateState=~"Needed" and Approved!=false), missingOtherUpdatesCount=countif(Classification !has "Critical" and Classification !has "Security" and UpdateState=~"Needed" and Optional==false and Approved!=false), lastAssessedTime=max(TimeGenerated), lastUpdateAgentSeenTime="" by SourceComputerId
    | extend compliance=iff(missingCriticalUpdatesCount > 0 or missingSecurityUpdatesCount > 0, 2, 1)
    | extend ComplianceOrder=iff(missingCriticalUpdatesCount > 0 or missingSecurityUpdatesCount > 0 or missingOtherUpdatesCount > 0, 1, 3)
)
on SourceComputerId
| project id=SourceComputerId, displayName=Computer, sourceComputerId=SourceComputerId, scopedToUpdatesSolution=true, missingCriticalUpdatesCount=coalesce(missingCriticalUpdatesCount, -1), missingSecurityUpdatesCount=coalesce(missingSecurityUpdatesCount, -1), missingOtherUpdatesCount=coalesce(missingOtherUpdatesCount, -1), compliance=coalesce(compliance, 4), lastAssessedTime, lastUpdateAgentSeenTime, osType=2, environment=iff(ComputerEnvironment=~"Azure", 1, 2), ComplianceOrder=coalesce(ComplianceOrder, 2) )
| order by ComplianceOrder asc, missingCriticalUpdatesCount desc, missingSecurityUpdatesCount desc, missingOtherUpdatesCount desc, displayName asc
| project-away ComplianceOrder

Missing updates list

Update
| where TimeGenerated>ago(5h) and OSType=="Linux" and SourceComputerId in ((Heartbeat
| where TimeGenerated>ago(12h) and OSType=="Linux" and notempty(Computer)
| summarize arg_max(TimeGenerated, Solutions) by SourceComputerId
| where Solutions has "updates"
| distinct SourceComputerId))
| summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification, BulletinUrl, BulletinID) by SourceComputerId, Product, ProductArch
| where UpdateState=~"Needed"
| project-away UpdateState, TimeGenerated
| summarize computersCount=dcount(SourceComputerId, 2), ClassificationWeight=max(iff(Classification has "Critical", 4, iff(Classification has "Security", 2, 1))) by id=strcat(Product, "_", ProductArch), displayName=Product, productArch=ProductArch, classification=Classification, InformationId=BulletinID, InformationUrl=tostring(split(BulletinUrl, ";", 0)[0]), osType=1
| union(Update
| where TimeGenerated>ago(14h) and OSType!="Linux" and (Optional==false or Classification has "Critical" or Classification has "Security") and SourceComputerId in ((Heartbeat
| where TimeGenerated>ago(12h) and OSType=~"Windows" and notempty(Computer)
| summarize arg_max(TimeGenerated, Solutions) by SourceComputerId
| where Solutions has "updates"
| distinct SourceComputerId))
| summarize hint.strategy=partitioned arg_max(TimeGenerated, UpdateState, Classification, Title, KBID, PublishedDate, Approved) by Computer, SourceComputerId, UpdateID
| where UpdateState=~"Needed" and Approved!=false
| project-away UpdateState, Approved, TimeGenerated
| summarize computersCount=dcount(SourceComputerId, 2), displayName=any(Title), publishedDate=min(PublishedDate), ClassificationWeight=max(iff(Classification has "Critical", 4, iff(Classification has "Security", 2, 1))) by id=strcat(UpdateID, "_", KBID), classification=Classification, InformationId=strcat("KB", KBID), InformationUrl=iff(isnotempty(KBID), strcat("https://support.microsoft.com/kb/", KBID), ""), osType=2)
| sort by ClassificationWeight desc, computersCount desc, displayName asc
| extend informationLink=(iff(isnotempty(InformationId) and isnotempty(InformationUrl), toobject(strcat('{ "uri": "', InformationUrl, '", "text": "', InformationId, '", "target": "blank" }')), toobject('')))
| project-away ClassificationWeight, InformationId, InformationUrl

Next steps