Hi Folks, Have a new HP Proliant running Server 2008 SBS. Have 6 workstations all running Win7 Pro and Office 2010. The problem we have is when you open Outlook it asks for your credentials. When entered outlook works just fine. But if you exit and open, it will ask for credentials again. Tried updates, creating new profiles in both outlook and windows. Becaues it happening to all workstation I'm guessing the problem lies in Exchange !?!? Have similar setups on other systems and we don't get this problem. Any ideas would be greatly appreciated. Brandan

Hi, Sounds like Outlook is configured to use Outlook Anywhere with basic authentication. Configure the Exchange server to accepts windows integrated authentication as well and you should be fine. Leif

Hi Leif, That makes sense, will make the adjustments and let you know. Thanks Brandan

Hi leif Made those changes. Outlook still asks for credentials after a reboot. Once entered outlook won't ask again even if you come out of outlook. But if you reboot again it will ask again. Outlook login network security is set to negotiate authentication. Brandan

Not sure if you tried this, manually download the OAB in the Outlook. EricOK Tire

Hi, For this issue, I want to clarify the following information before we go further: 1. Do you have any problem when you access via OWA? 2. Have you installed all the updates? Without installed Windows 2008 SP2 may cause the problem, please refer the following post: Microsoft Outlook asking for Username and Password http://social.technet.microsoft.com/Forums/en/exchangesvrgeneral/thread/e6e7aab7-1051-4981-a061-064c30e27889 3. How does the Outlook client connect to the Exchange Server? RPC over HTTP or TCP/IP? 4. Please check whether there is any error in your event log? Here are some related posts for you, hope it helps: Outlook ask for password everytime it start after Exchange Reboot http://social.technet.microsoft.com/forums/en-us/exchangesvrgeneral/thread/9BA0D4FE-ECC1-4B7B-A580-1B798910233B Small Business Server 08 Password pop up in outlook http://social.technet.microsoft.com/Forums/en-US/exchangesvrgeneral/thread/7d366bac-e20f-4cc0-8ecb-ea218ce51226 If the problem still exists, please help me to collect the information at your convenience, with the information, we can help you more efficiently. Best Regards, Evan