Outlook requesting password every time
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 This is stumping me. An AD user is getting prompted for a password in Outlook every single time. We have on-premise Exchange, I've changed his password, blown away the Outlook profile, and removed/recreated the credentials manager. He has Windows 10, I have Windows 7, both are on the domain. This happens on both computers which points to it being a domain account issue. Any thoughts?  
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 @BBigford 
 PC OS version has less to do with this that the OS of the server and what version of Exchange you are running.I almost had a suggestion for you as we have had some experience with this,.. but alas it was for Office 365. I have run into cases of the User account being corrupted but that was something else and did not affect Outlook as the user didn't have Exchange. 
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 Have you tried this: 
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 Actually another thing you can try would be to ''delete'' the local user profile and allow it to be rebuilt. Rename the c:\user\Xuser folder to c:\user_Xuser When he signs in again, the system should re-create the folder and allow you to setup Outlook back up. 
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 It's Exchange 2013, I forgot to mention that. I deleted the local profile, re-created the domain profile (created last year but never has used it). 
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 look at who the owner of the exchange email account is. Is it him? 
 Also, what version of Outlook?We''ve had weird problems with Outlook 2016 and Exchange 2010. 
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 I've the same problem, it was cause by Bitlocker. 



