There's probably a long list of reasons this can happen including the client configuration and network issues. Have they changed anything on the client side recently? Easy things: Check the event logs (client and DC's) Check name resoultion (affected desktop perspective) Re-login at the desktop Check the client configuration to be sure the client isn't set to prompt for creds Check the protocol binding order to be sure it's correct Off the top of my head, that's where I'd start. -----Original Message----- From: Erhard Haniffa [mailto:erhardhaniffa@xxxxxxxxxxxxxxxxx] Sent: Thursday, October 16, 2003 10:54 AM To: [ExchangeList] Subject: [exchangelist] Outlook + Exchange 2000 Login Problems http://www.MSExchange.org/ Hey folks, I have a fwe users on the network logging into their systems and then launching outlook. Normally when outlook launches it will just open up their mailbox. Today there have been two user who have been prompted for Username, Password and Domain when outlook is launched. Thay are logged into the domain and it keeps happening. Can anyone tell me why this happens? thanks Ed ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------