If your organization uses Microsoft® Exchange Server 2007 SP1, you must execute a cmdlet operation to enable managed Windows Mobile devices to access the Exchange Client Access Server. By default, when the SP1 release installs, Exchange Server 2007 prohibits devices from accessing Exchange ActiveSync® when the devices are managed by management software other than Exchange.

This section applies only to users of Exchange Server 2007 SP1 and not earlier versions of Exchange. This includes Exchange Server 2003 and Exchange Server 2007 without SP1.

The following procedure enables managed devices to access Exchange ActiveSync. If you configure AllowExternalDeviceManagementby using this procedure, it affects only Windows Mobile devices managed by software other than Exchange.

By default, the Boolean value for AllowExternalDeviceManagementis set to False.


To perform a cmdlet operation to enable device access to Exchange ActiveSync (SP1 users only)

  1. On the Startmenu of the computer that is running Exchange Server, choose Programs.

  2. Choose Microsoft Exchange Server 2007, and then choose Exchange Management Shell.

  3. At the Exchange Management Shell Command Prompt, type the following cmdlet:

Set-ActiveSyncMailboxPolicy -Identity MyPolicy -AllowExternalDeviceManagement $True

Where MyPolicy is an Exchange policy.