Exchange 2010 and Outlook 2010 requesting password every time it starts

Question

I have one Exchange 2010 server which is fully updated, the clients are running Outlook 2010 but some users are getting a prompt for credentials every time they open Outlook.

I have checked for common errors like the checked box Always request authentication.

I think this happens only with new users that are created in AD and in Exchange and I can't do gpupdate - could that be related?

Solution 1

I've had this issue before on a client site, it may be entirely unrelated but I'll post my experiences here.

My first port of call to diagnose it was to open up outlook, leave the credentials request window open and then see where the request for credentials was going to; outlook has a handy tool built in that shows you all the connections it's making. To view it locate the notification area outlook icon in the taskbar (the icons on the right of the screen by the clock, rather than the ones to the left by the start menu) and then ctrl+right-click to bring up a slightly different context menu, in there click Connection Status.

When I did this I found that outlook was trying to make a connection to an public folders on an old exchange server that had been decommisioned and that this was happening because the current public folder was redirecting to the old one. I deleted the public folder and recreated it and voila, no more login prompts.

Of course there are a hundred reasons your outlook clients could be asking for credentials but I do recommend checking the connection status to see where it's pointing to, I found that once I entered the credentials the connection dissapeared in connection status, so that's worth trying.

Solution 2

I faced the same problem but for some reason it all sorted out when I upgraded my MS Office to Service Pack 2 and I also deleted the stored user name and password with the following command rundll32.exe keymgr.dll, KRShowKeyMgr.

Comments

[Jorge Machado]

hi, thanks for the reply, but is not that. credentials is empty.

[Jorge Machado]

That settings I have checked to the are correct, as they are as another computer that works fine.

[Holocryptic]

Try uninstalling and reinstalling Outlook.

[Jorge Machado]

Already have done that too. I Think that could be a problem with the authentication from the computer to the AD . Have anyone experience something like this ? Another sinthom is that if i put my exchange account NOT in chached mode it does not ask me the password everytime that i startup the outlook. But that is not the solution...

[Holocryptic]

You say it only happens with new users you've created. Have you confirmed this?

[Jorge Machado]

so, this morning I have made some new tests, and I have test my outlook account on one computer that the user says that his outlook does not request credencials, and for my account it request it. So i think this is a config option on the server. Wee have recenty installed updates on Exchange server. Our network is fine and good configured to. The DNS issue i think it is not, but sometimes i can´t do gpupdate. Is this relevant ?

[Jorge Machado]

Yes, it only Happers in the new users / new installed machinnes... Have anyone have this sythoms ? ´

[Frederik]

Could you please add some references that agrees with you on that?