The Active Sync Device cannot be found

Unable to delete Active Sync Devices in Exchange.

Error: The Active Sync Device cannot be found.

When you try to remove the mobile partnership in EMC(User Mailbox -> Right click -> Manage Mobile Phone -> Remove mobile phone partnership) you get the below error message:

Solution:

1. Open EMS
2. Run following command: Get-ActivesyncDeviceStatistics –Mailbox “user alias”
3. Copy the GUID of the device that needs to be removed
4. Run below given command
5. Remove-ActiveSyncDevice –Identity “GUID copied in Step 3”

            Ex: Remove-ActiveSyncDevice –Identity “1140B5A5508D422741F2E87CE114E115”