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Unable to decommission Exchange 2007 - UM Issue RRS feed

  • Question

  • Hi All

    I recently transitioned Exchange from 2007 to 2013. I reach the point to decommission the 2007, however when the uninstall reached the UM role, it gives this error "Object reference not set to an instance of an object" I had followed this article to upgrade UM from 2007 to 2013 

    Upgrade Exchange 2007 UM to Exchange 2013 UM

    However,  I still have this issue. Any advice???

    Wednesday, November 29, 2017 2:42 PM

All replies

  • Hi.

    In Exchange 2007, maybe need disable log agent.

    Disable-CmdletExtensionAgent “Admin Audit Log Agent”

    And maybe, run again "setup /prepareAD" Exchange 2013 and restart both server.


    MCITP, MCSE. Regards, Oleg

    Wednesday, November 29, 2017 4:13 PM