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Jorge Machado
Asked: 2011-05-14 00:31:53 +0800 CST

Exchange 2010 and Outlook 2010 requesting password every time it starts

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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?

exchange-2010 outlook-2010

12 Answers

  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.

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  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.

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  3. Check control panel- user accounts and select manage your credentials, and look for the Outlook related information. Edit the information to reflect your current password.

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  4. They need to change their user password. Once they do that, logout and log back in. That should fix the problem.

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  5. I would also check to see if the users who are getting prompted are set to use Outlook Anywhere (RPC) and have "On fast networks, connect using HTTP first, then connect using TCP/IP" checked. This would cause them to be prompted for their password when opening their profile. This setting is found at:

    File> Account Settings> Data Files tab> Settings > Connection Tab > Exchange Proxy Settings

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  6. Is this issue definitely related to accounts and not PCs? ie, if you set up one of the new accounts on another PC with their Outlook/Exchange working fine, do you still get the problem? Also, windows logs on the effected computers aren't showing anything relevant?

    I've seen this happen before, but it was caused by intermittent DNS issues on a badly set up network; the network was re-wired and reconfigured and it solved the problem, so I couldn't give you the exact change that solved it unfortunately!

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  7. This is a common complaint.

    I could regurgitate this set of posts, but here is a link that helped me solve this in the past: http://social.technet.microsoft.com/Forums/en/office2010/thread/cd38f3f2-892f-470c-b52e-17b8beeb275e

    If one of these steps works for you, please post what solved it.

    I also found these: http://blog.montopolis.com/2010/10/24/outlook-2010-does-not-save-password-with-exchange/ http://www.msoutlook.info/question/481

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  8. I Had this issue and applied the Office 2010 SP1 - it is a known error with Office 32bit on a 64Bit version of windows 7

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  9. Couple of thinks to check:

    1. Check to see if the time on both the clients and server is synced. If they are out of sync then Kerberos stops working, See the following TechNet article for more details: http://technet.microsoft.com/en-us/library/cc779260(v=ws.10).aspx

    2. Also on the clients check the following file C:\Windows\security\database\secedit.sdb. If the "Date modified" hasn't changed in a while then this fault might be caused by a corrupt Group Policy Security Database. Delete secedit.sdb on the effected clients and then run grpupdate /force from a Command Prompt or reboot the client.

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    1. Go into Outlook - File - Info - Account Settings - Double click the Exchange Account - More Settings - Security Tab - CHECK the Always Prompt for Logon Credentials - Close Outlook - enter username and password - click on Remember my Credentials - close Outlook and repeat - and don't forget to click on Remember my Credentials. Go back into More Settings - Security Tab - and REMOVE the check from the Alway Prompt for Logon Credentials. Close Outlook.

    2. Go to Control Panel-User Accounts-Manage your credentials, under Generic Credentials you will see your Outlook Saved Password. My belief is the password saved in this area is invalid. Remove the saved password and log on to Outlook 2010.

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