Outlook 2010 prompting for credentials
Posted on 2014-10-06
I have an interesting issue with a group policy running on our new Windows 7 workstations.
Our setup is as follows:
Our server is running Windows Server 2003 with Exchange 2003.
Our old Windows XP workstations are running Office 2007.
Our new Windows 7 workstations are running Office 2010.
Our Windows XP workstations run fine with our current group policy but we have found that when we add our new Windows 7 workstations to the same policy Outlook 2010 stops connecting to the server after about a week and requests you type in a username and password. I have tried the users domain details but it fails to authenticate. The strange part is Outlook works for about a week and then just stops working after that it starts requesting for authentication details.
If I remove the workstation from the group policy and perform a “gpupdate /force” on the host then Outlook will once again connect to the server.
I have checked the event logs on the server and found the following events:
Event Type: Failure Audit
Event Source: Security
Event Category: Account Logon
Event ID: 675
User: NT AUTHORITY\SYSTEM
User Name: sthompson
User ID: linkwon\ sthompson
Service Name: krbtgt/linkwon.COM
Pre-Authentication Type: 0x0
Failure Code: 0x19
Client Address: 10.1.40.7
Does anyone know of any differences in Office 2010 that may be causing this issue where Outlook 2010 requests authentication?