Hi all, Outlook 2003 / 2007 keeps prompting users for username and password. It happens at completely random times. Is there anything on the exchange server i can check? The server is server 2003 with exchange 2003. Any suggestions would be much appreciated. Thanks

It's probably a problem with your network. One way this can happen is if users switch networks, such as from a wired to a wireless connection or from an internal to an external connection, where it ends up connecting to a different CAS that doesn't know about its existing connection. For example, say you have a wired netowrk that goes straight to the CAS, and you have a wireless network that goes through a TMG server that load balances a server farm of CAS servers. When you unplug your wired connection, the connection switches paths, and an authentication dialog pops up because the new CAS to which you're connection knows nothing about your session. This can also happen if you have misconfigured load balancers, CAS servers using DNS round-robin "load balancing" (which isn't), or any number of other network issues.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

I suppose it could. You might want to ask about this in the SBS forum since migrating SBS isn't exactly the same as migrating regular Exchange. http://social.technet.microsoft.com/Forums/en/smallbusinessserver/threadsEd Crowley MVP "There are seldom good technological solutions to behavioral problems."

I suppose it could. You might want to ask about this in the SBS forum since migrating SBS isn't exactly the same as migrating regular Exchange. http://social.technet.microsoft.com/Forums/en/smallbusinessserver/threadsEd Crowley MVP "There are seldom good technological solutions to behavioral problems."

thanks for your reply, there is only one sbs in the network, however . . the current sbs is a replacement for an old sbs and i have noticed in exchange system manager the old sbs server name is still visible under servers. The old server is powered off and not being used for anything at all. Could this be the issue? Thanks