Some of our users have to provide userid and password when they open Outlook. It appears to be random. We have a mix of operating systems like XP, Windows 7, Windows 2012 RDS and this occurs on Outlook 2007, 2010 and 2013.
We have tried deleting existing credentials and creating new profiles unsuccessfully. Some of our users don't have this issue. I have admin authority and I am running Windows 8 locally without having to provide user and password. However, if I log on to Windows 2012 RDS or Windows 2003 RDP I have to. Another person in our admin groups has to provide it every time.
Some XP users do and others don't. I'm confused.