We have implement Outlook Anywhere with Autodiscover. Everything is working well exept that clients sometimes lost their RPC Proxy. The Proxy automatically changed to the internal Mailbox Netbios Name. All URLs are configured in EX 2007. What can I do/ check here? Here ist the test Autoconfig file (only the important entries): Protocol: Exchange HTTP Server: NETBIOSNAME Certifecate Pnnapal Name: msstd:NETBIOSNAME I think thois is the error. In the server field the FQDN should apperas. And on the certificate we have no such a name! How can I change this name? Thanks for any help