Check that Outlook profile, security tab, doesn't have "always prompt for username and password" checked. Start, Run, "control userpasswords2", then on the Advanced tab click "manage passwords" and make sure your Exchange server isn't listed with a saved password. Carl -----Original Message----- From: Michelle [mailto:estradam@xxxxxxxxxxxxxxxxxx] Sent: Friday, September 16, 2005 10:02 AM To: [ExchangeList] Subject: [exchangelist] have to authenticate to ms exchange 2000 Using Outlook 2000, user needs to authenticate to the server to access email. She didn't have to authenticate in the past.