POP3 Basic Auth Disabled in Microsoft 365
Issue: Problem receiving incoming emails with POP3 Protocol
Notification from Outlook Support on Deprecation of Basic authentication in Exchange Online for POP, IMAP from October 1 2022: https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online
Solution : Permanent Solution can be done by enabling Modern authentication protocol as OAuth 2.0 https://docs.microsoft.com/en-us/exchange/client-developer/legacy-protocols/how-to-authenticate-an-imap-pop-smtp-application-by-using-oauth
Reference Video lInk: https://www.youtube.com/watch?v=mBIVcSLdDYw
Login to Office 365 admin panel & click on Health >> Health Service Tab
It will show Exchange Online POP3 Disabled
Clicking on "Exchange Online POP3 Disabled" will show the given message
Click on "Help & Support"
Paste the Code " Diag: Enable Basic Auth in EXO " in the search box
Click on "Run Test"
Select "Protocol to Enable" as "POP" & check the acknowledgement & click on "Update Settings"
Once settings are updated , the Basic Authentication will be re-enabled
Check the incoming mail from the mailbox
Article ID: 1524
Last updated: 07 Jul, 2022