
When you go in to “Active Directory Users and Computers”, and view a user’s properties, you’ll notice in the UPN section, you can drop it down and change it from internaldomain.local, to Instructions are available here:Īfter adding your e-mail domain to the UPN suffix list. If your email domain is different from your organisation domain you first have to add the UPN suffix (which is the actual e-mail address domain name) to the Active Directory Domain and Trusts. You need to change users logon names to make them match with their email addresses. The user’s UPN must match their e-mail address.

Outlook 2016 does all the configuration automatically, and expects to find everything it needs via auto discover. On these password prompts, you’ll notice it’s authenticating for the users e-mail address. The problem is AD side ! ( Outlook 2016 + Exchange 2013 only ) I did what you said to do and today I went to open outlook and it did the same thing again and said need passwordĪnd so I tried the credentials thing in the control panel and it would not work When I was searching about your issue on the Web, I found an informative article on

"Credential” in the search box >you will then see ‘Credential Manager’ > Click on

