Forum Discussion
Outlook 2013 with Modern Authentication gives prompt because of dual RP.
We are in the process of migrating some mailboxes to EXO. When on prem users try to open EXO users calendars they are prompted for credentials. In order to eliminate these prompts in Outlook 2013 we ...
OK, that particular issue was solved with the following command:
Set-AdfsProperties -IntranetUseLocalClaimsProvider $true
What happens now is that on premise users are prompted to log on to Office 365 when they open an EXO users calendar. The form come pre filled with the upn as username (not resolvable). If they fill in their email address it discovers that the domain is federated, redirects to adfs and logs on automatically.
Is there a way to make Outlook pre fill the form with the email address, maybe like a client side registry setting?