This issue occurs when you move users from Office Communication Server (OCS) 2007 to Microsoft Lync Server 2013. Additionally, you may receive an error message that resembles the following:

Move-CsLegacyUser : Object reference not set to an instance of an object. At line:1 char:1
+ Move-CsLegacyUser xxxx +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Move-CsLegacyUser], NullReferenceException
+ FullyQualifiedErrorId : System.NullReferenceException,Microsoft.Rtc.Management.AD.Cmdlets.MoveOcsLegacyUserCmdle T


This issue occurs because an access violation exception is raised when handling the move request.


To fix this issue, install the  January 2017 cumulative update 5.0.8308.984 for Lync Server 2013.

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