Hello I use Exchange Server 2007 SP1 RU4 (CCR) with Outlook 2003. Sometimemy clients do ask for a password, even they are in the local network. What could be a reason and a solution for this? Thanks a lot, Norbert

Check the Servers Event App Log for any related errors. I would also suggest running ExBPA to see if it finds anything.

hello could you proive more info in order to better troubleshooting the issue? (1)is it unavailable with all clients with the issueor some special clients? (2) pls check connectivity from client to exchange server as the following link? http://support.microsoft.com/kb/325487/en-us (3) As John's said, pls check whether reports any error of applicaiton log of exchange server , then post it here; (4) pls run "dcdiag /v >.txt" and "netdiag /v" on your DC server, then post it here; (5) pls run BxBPAon your exchange server, then post it here; BPA learning link: http://technet.microsoft.com/en-us/exchange/bb288481.aspx Hope it helps; if anything unclear, pls let me know, or mail to jakey0628@126.com; -jack