Applies to: Exchange Online, Exchange Server 2016

This cmdlet is available in on-premises Exchange Server 2016 and in the cloud-based service. Some parameters and settings may be exclusive to one environment or the other.

Use the New-ActiveSyncDeviceAccessRule cmdlet to define the access levels for Exchange ActiveSync devices based on the identity of the device.

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

New-ActiveSyncDeviceAccessRule -AccessLevel <Allow | Block | Quarantine> -Characteristic <DeviceType | DeviceModel | DeviceOS | UserAgent | XMSWLHeader> -QueryString <String> [-Confirm [<SwitchParameter>]] [-DomainController <Fqdn>] [-WhatIf [<SwitchParameter>]]

This example creates device access rules that blocks access for iPhones that are running iOS version 6.1.1.

New-ActiveSyncDeviceAccessRule -Characteristic DeviceOS -QueryString "iOS 6.1 10B145" -AccessLevel Block

This example creates a device access rule that uses the UserAgent characteristic to allow access for Nokia E52-1 phones.

New-ActiveSyncDeviceAccessRule -Characteristic UserAgent -QueryString NokiaE521/2.00()MailforExchange -AccessLevel Allow

You can create multiple rules that define groups of devices: Allowed devices, blocked devices, and quarantined devices.

You need to be assigned permissions before you can run this cmdlet. Although all parameters for this cmdlet are listed in this topic, you may not have access to some parameters if they're not included in the permissions assigned to you. To see what permissions you need, see the "Exchange ActiveSync settings" entry in the Clients and mobile devices permissions topic.


Parameter Required Type Description




The AccessLevel parameter specifies the access level of devices that are defined by the rule. Valid values for this parameter are Allow, Block and Quarantine.




The Characteristic parameter specifies the device characteristic or category that's used by the rule. Valid values for this parameter are:

  • DeviceModel

  • DeviceType

  • DeviceOS

  • UserAgent

  • XMSWLHeader




The QueryString parameter specifies the device identifier that's used by the rule. This parameter uses a text value that's used with Characteristic parameter value to define the device. Wildcards or partial matches aren't allowed.

You can use the Get-MobileDevice cmdlet to find the text values that you can use with the QueryString parameter. For example: Get-MobileDevice | Format-List DeviceOS,DeviceModel,DeviceType.




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.




This parameter is available only in on-premises Exchange 2016.

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,




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.




This parameter is reserved for internal Microsoft use.

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.

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.