Get-ClientAccessRule

Reference

Module:: ExchangePowerShell

Applies to:: Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection

Note

Beginning in October 2022, we've disabled access to client access rules for all existing Exchange Online organizations that weren't using them. In September 2024, support for client access rules will end for all Exchange Online organizations. For more information, see Update: Deprecation of Client Access Rules in Exchange Online.

This cmdlet is functional only in Exchange Server 2019 and in the cloud-based service. Some parameters and settings may be exclusive to one environment or the other.

Use the Get-ClientAccessRule cmdlet to view client access rules. Client access rules help you control access to your cloud-based organization based on the properties of the connection.

For information about the parameter sets in the Syntax section below, see Exchange cmdlet syntax.

Syntax

Get-ClientAccessRule
   [[-Identity] <ClientAccessRuleIdParameter>]
   [-Confirm]
   [-DomainController <Fqdn>]
   [-WhatIf]
   [<CommonParameters>]

Description

Client access rules are like mail flow rules (also known as transport rules) for client connections to your organization. You use conditions and exceptions to identify the connections based on their properties, and actions that allow or block the connections.

You need to be assigned permissions before you can run this cmdlet. Although this topic lists all parameters for the cmdlet, you may not have access to some parameters if they're not included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see Find the permissions required to run any Exchange cmdlet.

Examples

Example 1

Get-ClientAccessRule

This example shows a summary list of all client access rules.

Example 2

Get-ClientAccessRule "Block Client Connections from 192.168.1.0/24" | Format-List

This example retrieves details about the client access rule named "Block Client Connections from 192.168.1.0/24".

Parameters

-Confirm

The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.

Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax: -Confirm:$false.
Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you acknowledge the command before proceeding.

Type:	SwitchParameter
Aliases:	cf
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False
Applies to:	Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection

-DomainController

This parameter is functional only in on-premises Exchange.

The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name (FQDN). For example, dc01.contoso.com.

Type:	Fqdn
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False
Applies to:	Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection

-Identity

The Identity parameter specifies the client access rule that you want to view. You can use any value that uniquely identifies the client access rule. For example:

Name
Distinguished name (DN)
GUID

Type:	ClientAccessRuleIdParameter
Position:	1
Default value:	None
Required:	False
Accept pipeline input:	True
Accept wildcard characters:	False
Applies to:	Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection

-WhatIf

The WhatIf switch simulates the actions of the command. You can use this switch to view the changes that would occur without actually applying those changes. You don't need to specify a value with this switch.

Type:	SwitchParameter
Aliases:	wi
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False
Applies to:	Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection

Inputs

Input types

To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types. If the Input Type field for a cmdlet is blank, the cmdlet doesn't accept input data.

Outputs

Output types

To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types. If the Output Type field is blank, the cmdlet doesn't return data.

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