• Estimated time to complete: 2 minutes.
  
  
• You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Exchange ActiveSync settings" entry in the Clients and Mobile Devices Permissions topic.
  
  
• For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard Shortcuts in the Exchange Admin Center.
  
  

Tip:
Having problems? Ask for help in the Exchange forums. Visit the forums at: Exchange Server, Exchange Online, or Exchange Online Protection.

Use the EAC to enable or disable Exchange ActiveSync

1. In the EAC, navigate to Recipients > Mailboxes.
   
   
2. In the list of user mailboxes, click the mailbox that you want to enable or disable Exchange ActiveSync for, and then click Edit .
   
   
3. On the mailbox properties page, click Mailbox Features.
   
   
4. Under Mobile Devices, do one of the following:
   
   
   • To disable Exchange ActiveSync click Disable Exchange ActiveSync.
     
     A warning appears asking if you're sure you want to disable Exchange ActiveSync. Click Yes.
     
     
   • To enable Exchange ActiveSync, click Enable Exchange ActiveSync.
     
     
5. Click Save to save your change.
   
   

Note:
You can enable and disable Exchange ActiveSync for multiple user mailboxes by using the EAC bulk edit feature. For more information about how to do this, see the "Bulk edit user mailboxes" section in Manage User Mailboxes.

Use the Shell to enable or disable Exchange ActiveSync

This example disables Exchange ActiveSync for the mailbox of Yan Li.

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Set-CASMailbox -Identity "Yan Li" -ActiveSyncEnabled $false

This example enables Exchange ActiveSync for the mailbox of Elly Nkya.

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Set-CASMailbox -Identity Ellyn@contoso.com -ActiveSyncEnabled $true

For detailed syntax and parameter information, see Set-CASMailbox.

To verify that you’ve successfully enabled or disabled Exchange ActiveSync for a user mailbox, do one of the following:

• In the EAC, navigate to Recipients > Mailboxes, click the mailbox, and then click Edit .
  
  
• On the mailbox properties page, click Mailbox Features.
  
  
• Under Mobile Devices, verify whether Exchange ActiveSync is enabled or disabled.
  
  

Or

• Run the following command in the Shell.
  
  

  	Copy Code
  Get-CASMailbox <identity>

  If Exchange ActiveSync is enabled, the value for the ActiveSyncEnabled property is True. If Exchange ActiveSync is disabled, the value is False.