Exchange ActiveSync devices are marked as "Blocked" in EMS and EMC when the devices are synchronizing with the Exchange Server 2010 server
Assume that some Exchange ActiveSync (EAS) devices are synchronizing with servers in a Microsoft Exchange Server 2010 environment. When you check the status of the EAS devices in Exchange Control Panel (ECP) or by running the Get-ActiveSyncDevice cmdlet in Exchange Management Shell (EMS), the status is unexpectedly marked as Blocked. However, the data is synchronized successfully.
This issue occurs because the properties of the EAS devices in Active Directory are not updated regularly. Therefore, the actual synchronization status and the properties of the EAS devices that you retrieve from Active Directory are different.
To resolve this issue, install the following update rollup:
2891587 Description of Update Rollup 3 for Exchange Server 2010 Service Pack 3
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the Get-ActiveSyncDevice cmdlet, go to the following Microsoft website:
Article ID: 2891194 - Last Review: 11/25/2013 18:27:00 - Revision: 1.0
Microsoft Exchange Server 2010 Service Pack 3
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