Recently I had a client running Windows 7 and we were trying to connect him to the new SBS 2011 server but it would not save his creditenials properly. "Your system administrator does not allow the use of saved credentials to logon to the remote computer computername/ipadress because its identity is not fully verified. Please enter new credentials." I found this blog on the matter and worked like a charm.
http://blog.ronnypot.nl/?p=247
Computer Repair Lakeland, FL