I recently upgraded our Exchange 2007 server running on Server 2003 to Exchange 2013 running on a VM 2012 server. I have several users that have always had PST's that reside on share (previously on 2003 server, now on 2012.) The users have never had any issues until I moved everyone to the new servers. Now the users are receiving errors when they try to access there pst on those shares. They can still access the PST but every once in a while they get an error and usually have to restart Outlook several times. Attached is a picture of the error they are receiving.
I have tried using mapped drives and unc, but still receiving the error. I have also made users the "owner" with full permissions on the share but still get the errors. I have read that Microsoft does not support PST's on network shares, but we've been doing it for almost 10 years with no issues. Does anyone have any suggestions because I am at a lost.