(Cloud) Tip of the Day: How to disable ActiveSync for Office 365 users

Today’s Tip…

To disable ActiveSync for users by using Exchange Online PowerShell, follow these steps:

  1. Connect to Exchange Online by using remote PowerShell. For more information about how to do this, go to the following Microsoft website:
    Connect to Exchange Online using remote PowerShell
  2. Do one of the following:
  • To disable ActiveSync connectivity for a single user, run the following command:
    Set-CASMailbox -Identity <Mailbox ID> -ActiveSyncEnabled $False
  • To disable ActiveSync connectivity for a group of users, use the Get-User cmdlet to change the scope of the command.
    For example, to disable ActiveSync for all the users in the Sales department, run the following command:
    Get-User -RecipientTypeDetailsUserMailbox | where {$_.Department -eq "Sales"} | Set-CASMailbox -ActiveSyncEnabled $False
  • To disable ActiveSync for all users in an organization, run the following command:
    Get-Mailbox | Set-CasMailbox -ActiveSyncEnabled $False

Exchange Admin Center

To disable ActiveSync for users in Office 365 by using the Exchange admin center, follow these steps:

  • Sign in to the Office 365 portal (https://portal.office.com) as a global admin.
  • Click Admin, and then click Exchange.
  • In the left navigation pane, click recipients, and then click mailboxes.
  • Select the user mailbox that you want to change, and then click Edit
  • Click mailbox features, and then click Disable Exchange ActiveSync.


  • Click OK.

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