We use Exchange 2010 and Outlook 2010 here (Windows 7 64 bit OS). I have one user where Outlook keeps asking for her username and password upon starting the program. We enter the username and PW, click the box to keep credentials but it keeps popping up.
If she locks her PC or it times out and locks itself, she is automatically locked out of her account, I then have to unlock her. This happens if Outlook is open or closed. If she is logged out, it seems to be ok and she can log in in the morning. But once logged in, it the computer goes to sleep (locks) or she manually locks it, she is locked out and I need to unlock her in AD.
She can receive email on her phone just fine, it just won't stay connected on the PC.
I tried resetting her PW in AD multiple times but it still doesn't work. I uninstalled/reinstalled Office and that didn't change anything. The next thing I was going to try was deleting and recreating her profile on the PC but before I did that, I wanted to see if there was anything else I could try.