I was getting the same error exporting from my Lync server. It seemed too similar to this issue with Exchange server and the latest WMF 3.0 release: http://blogs.technet.com/b/exchange/archive/2012/12/14/windows-management-framework-3-0-on-exchange-2007-and-exchange-2010.aspx
So I uninstalled the KB2506143 update and restarted the Lync server. Magically I was able to export from the archive once again. Cheers,