We've had this happen too, typically occurring when provisioning a new PC. I always figured we had something configured incorrectly, but the workaround of provisioning w/o encryption in online mode and then switching it over later makes it hard to justify the troubleshooting time :)
I heard a report of an existing user experiencing this today and they were supposed to call me, but they must've given up and re-booted or something. ~JasonG > -----Original Message----- > From: John Grempler [mailto:jgrem...@jhmi.edu] > Sent: Monday, December 06, 2010 16:09 > To: MS-Exchange Admin Issues > Subject: RE: Outlook is prompting for credentials > > That issue happened to us. We were able to make sure http connections was > not checked and make sure cache mode was turned off. Our enterprise group > finally solved the issue, but no one here (we run our own exchange servers, > not enterprise) was ever told what or how the issue was eventually solved. > > > -----Original Message----- > From: Andrew Grimes [mailto:agri...@cu-portland.edu] > Sent: Monday, December 06, 2010 12:45 PM > To: MS-Exchange Admin Issues > Subject: RE: Outlook is prompting for credentials > > Thanks Michael and Jason for the reply. I'll continue to troubleshoot and > let you know if I come up with anything. > > Andrew > > -----Original Message----- > From: Jason Gurtz [mailto:jasongu...@npumail.com] > Sent: Friday, December 03, 2010 10:30 AM > To: MS-Exchange Admin Issues > Subject: RE: Outlook is prompting for credentials > > We've had one occurrence of this here with a particular user. I think it > was a new machine roll-out to this user. I'll check and see if there was a > resolution or if it's still happening here and there. > > Our office 2010 roll-out is being stymied by the VBA version change > specifics affecting MS Biz Solutions GP and FRX so office versions have > been going back and forth lately for certain users. Might be related? > > ~JasonG > > > -----Original Message----- > > From: Michael B. Smith [mailto:mich...@smithcons.com] > > Sent: Friday, December 03, 2010 12:46 PM > > To: MS-Exchange Admin Issues > > Subject: RE: Outlook is prompting for credentials > > > > I've got two cases on this open with PSS (two different clients). > > > > > > > > I hate to say this, but so far: no clue. We've done network traces, > > blah > blah > > blah. It's a problem I don't even like to talk about, I've banged my > head up > > against the wall with it, too many times. > > > > > > > > Regards, > > > > > > > > Michael B. Smith > > > > Consultant and Exchange MVP > > > > http://TheEssentialExchange.com > > > > > > > > From: Andrew Grimes [mailto:agri...@cu-portland.edu] > > Sent: Thursday, December 02, 2010 7:26 PM > > To: MS-Exchange Admin Issues > > Subject: RE: Outlook is prompting for credentials > > > > > > > > You have to love intermittent issues. No one I asked to log in > > received > a > > prompt. I finally found one, so here is the connection status. > > > > > > > > Server name Type Interface Conn > Status > > Req/Fail Avg Resp > > > > Server.domain.com Mail Local Area... TCP/IP > Established 30/0 > > 4 > > > > Server.domain.com Mail > HTTPS Connecting > > > > > > > > I'll continue to monitor this and see if this is consistent. > > > > > > > > I double checked IIS on both servers, and checked against the old > > decommissioned server. Haven't found any consistency issues yet. I > > did make a couple of setting changes in IIS for testing, but I didn't > > find > anything > > that worked. _autodiscover just points to one server, so I'm thinking > the > > connection should hit the same server every time, correct? > > > > > > > > Andrew > > > > > > > > > > > > From: Castillo, Daniel (Directory Services) > [mailto:daniel.casti...@hp.com] > > Sent: Thursday, December 02, 2010 3:50 AM > > To: MS-Exchange Admin Issues > > Subject: RE: Outlook is prompting for credentials > > > > > > > > Are the IIS security settings consistent? > > > > > > > > > > > > ~D > > > > > > > > From: Haritwal, Dhiraj [mailto:dhiraj.harit...@ap.sony.com] > > Sent: Thursday, December 02, 2010 2:42 AM > > To: MS-Exchange Admin Issues > > Subject: RE: Outlook is prompting for credentials > > > > > > > > When it's asking for password, what's the outlook connection status. > > > > > > > > Dhiraj > > > > > > > > > > > > From: Andrew Grimes [mailto:agri...@cu-portland.edu] > > Sent: Thursday, December 02, 2010 8:00 AM > > To: MS-Exchange Admin Issues > > Subject: Outlook is prompting for credentials > > > > > > > > Hello everyone, > > > > > > > > I've just finished migrating to two new servers (both exchange 2010 > sp1), > > and now my users are being prompted for credentials. Worst of all the > issue > > is intermittent. User's only get prompted half the time. I use > > Outlook > on > > two different machines and sometimes I am prompted on one of them, > > other times on the other. If I create a new profile I will get > > prompted > the > > first time I open Outlook, but if I cancel without entering > > credentials, > it will > > not prompt me the second time I open Outlook. 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