Citrix PVS 6.1 vdisk update – An Unexpected MAPI Error occured
According to citrix’s article (that applied to the wrong version of PVS) http://support.citrix.com/article/CTX126307 try rebooting the Citrix SOAP service
My fix however was simply change the Microsoft Volume Licensing option on the VDISK to NONE, OK, then change it back.
