Troubles with Mail Fetching

Troubles with Mail Fetching

We began experiencing issues with mail fetching today and it appears it was the result of the depreciation of Basic Authentication within Exchange Online. As a result we are receiving an error message stating:

Mailbox is not accessible : "Incorrect username or password.". In the meantime, mails will not be fetched in the mail fetching schedule.

Our Mail Server settings prior to the issue today were to connect using the IMAPS protocol using Basic Authentication over port 993, as indicated by Office365: 


We have attempted to convert to OAuth but are now receiving the error: 

Mailbox is not accessible : "Unable to get mail server settings.". In the meantime, mails will not be fetched in the mail fetching schedule.

Please advise on how we can restore mail server fetching. 

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