Forum Discussion
Outlook prompts for password using ADFS 3.0
Yes I did. Adfs itself works fine by using the browser, but only not when using Outlook 2016
PKlapwijk Although this is an old article. I just wanted to add my findings as i have experienced exactly this.
What solved my problem was https://support.microsoft.com/en-gb/help/3126599/outlook-prompts-for-password-when-modern-authentication-is-enabled
This fix was:
- HKEY_CURRENT_USER\Software\Microsoft\Exchange
- On the Edit menu, point to New, and then click DWORD Value.
- Type AlwaysUseMSOAuthForAutoDiscover, and then press Enter.
- Right-click AlwaysUseMSOAuthForAutoDiscover, and then click Modify.
- In the Value data box, type 1, and then click OK.
- HKEY_CURRENT_USER\Software\Microsoft\Exchange
For real SSO experience in Outlook you need Modern authentication enabled. Otherwise you get the basic auth prompt, that's the expected behavior. If you want more info check the AD FS whitepapers: https://www.microsoft.com/en-us/download/details.aspx?id=36391
Oh, and Modern auth needs to be enabled both client-side and server-side.
Thanks Vasil! This solved my problem. I enabled the modern auth on O365 tenant but not on my Outlook 2013 client. After doing that no prompts anymore and it worked. Outlook 2016 has this already setup and now checking the need for Outlook 2010.
https://support.office.com/en-us/article/Enable-Modern-Authentication-for-Office-2013-on-Windows-devices-7dc1c01a-090f-4971-9677-f1b192d6c910
