Oct 15 2020
Starting the last few weeks, all of sudden I have this Outlook password pop-up problem.
I have been searching for solution without success.
Windows Server 2012R2
Exchange 2013 latest CU 23 on premise.
valid SAN SSL for both mail.domain.com and autodiscover.domain.com
Outlook 2019 latest update.
User ABC has email email@example.com
A few seconds after Outlook opened & connected to Exchange server, the password pop-up will shows.
Strangely the message shows: "Connecting to email firstname.lastname@example.org " (instead of email@example.com)
and it shows username: firstname.lastname@example.org and the empty password textbox.
The email email@example.com does not exist in exchange (I've checked using get-mailbox command & search on EAC)
At this point the Outlook still shows Connected to Exchange server at the bottom right.
Even after click Cancel the Outlook still connected. And user can send/receive emails no problem.
I've tried to fix it by doing the following:
1. Remove password from Credential Manager
2. Create new Outlook profile.
3. Create new Computer profile & new Outlook profile.
4. Open Outlook in Safe mode
5. Disable antivirus.
Also notice this problem does not happen on the local network where the exchange server sits in.
It happens to a few remote users.
Any advise how to fix this will be greatly appreciated.