Remove ActiveSync Device via Exchange Management Shell

1. Log on to the exchange server.
2.  Open the Exchange Mangement Shell.
3. To get Devices associated with a Mailbox:
4. Get-ActiveSyncDeviceStatistics -Mailbox:"alias"
5. Use the output of the command above to delete a specfied device via identity:
6. Remove-ActiveSyncDevice -Identity iPhone_TonySmith