Authentication fails when email address and UPN do..

Community

Watch Events Blog Market Forum My Products My Pages

Explore

Explore Popular Posts Games Movies Jobs Offers Fundings

© 2026 Teras CHAT

About • Directory • Contact Us • Developers • Privacy Policy • Terms of Use • Refund

created a new article

7 d

Authentication fails when email address and UPN do not match | #exchange connectivity diagnostic

Authentication fails when email address and UPN do not match

I’ve just switched on Modern Authentication in Office 365, following on from Microsoft’s recommendation.

Like

Comment