Exchange 2019 auth login 535 5.7.3 Authentication unsuccessful

Question

Hello everyone I have a problem with enabling oauth login. I successfully login via telnet with enterprise admin right but simple user get error "535 5.7.3 Authentication unsuccessful" on this reason could some body help me?

when I log in with admin right

when login with domain user right

Answer 1

Hi @Damir Gimazetdinov

Have you created an additional receive connector for the telnet client (192.168.22.162 in this case) or are you using the default ones?

Please enable protocol log on the receive connector if you haven't yet.

In the protocol log you would be able to see the detailed reason why the authentication failed.

Example:

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.