I am experiencing a password prompt on Outlook 2010 on a initial load. For example, I reboot my machine, log into Windows, then load up Outlook 2010. I get a password prompt. What I am notic...
Outlook Client settings don't matter in this case - the issue is caused by the CAS trying to use Negotiate header for Kerberos and NTLM when it does 401 challenge to the client.