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Hi Guys,
I has a case error unknow username or bad password when setup email office 365 through POP3 or IMAP on Outlook
Exchange still work.
Account is using default domain of MS : *@abc.onmicrosoft.com
License user: Exchange online plan 2
I sure that all config is correct. I tried change difference password, sure check POP, IMAP, SMTP authen in manage email app and recheck it. Enable MFA & use App password. But still not ok
I tried with license Basic that login successful with app password
Version: Win10, Office 2019 pro
Ping to outlook & smtp server is successful.
Anyone help me????
Using Classic Outlook on Windows for personal email, calendar, and contact management
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Answer accepted by question author
Hi Shyamal Debnath - MSFT
I check it Basic authentication is disable by Microsoft without notify for customer. Enable it and connect is successful. Thank for your suggestion.
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Hi LinhNguyen_194,
Thanks for the reply. Since the issue happen with all the users therefore, I would suggest you may please make sure that Basic authentication for POP and IMAP protocols it enabled for your tenant.
If is already enabled then please disable it and wait for some times then re-enable Basic authentication for these protocols via running the PowerShell command to check this issue. See detailed information: Enable Basic authentication for POP and IMAP protocols
Let me know the result so that we can further assist you. Your understanding is highly appreciated.
Best regards,
Shyamal
Thanks for ur reply
I did recheck IMAP & POP and wait 24h. Still not ok
Cause of personal reason, i have to use this protocols.
It happen with all user that using default domain.
I check testconectivity POP3 & IMAP but not block any port.
Don't know why??
Can u have another suggestion?
Hi LinhNguyen_194,
Thank you for posting. Does this issue happen with every users or specific user in Exchange Online plan 2?
If you recently enabled MFA setting, please wait for some time and then use App password to check this issue.
You may also using the Classic Exchange admin center to disable and then re-enable POP3/IMAP4 for a user. See Enable or Disable POP3 or IMAP4 access for a user in Exchange Online
May I know is there any specific reason to set up Exchange Online mailbox via using POP/IMAP?
Moreover, I would like to clarify since in our forum we don't suggest/support to set up Exchange Online mailbox via using POP/IMAP protocol. We always recommend to use the automatic via Exchange protocol to set up Office 365 account on Outlook desktop client.
Regarding this point, we would truly appreciate your kind understanding.
Best regards,
Shyamal