Basic Authentication for All Exchange Online Tenants Stops in October 2022 – Office 365 for IT Pros

On September 12, I received message center notifications MC284549 and MC284559, both of which informed me that Microsoft had disabled basic authentication for POP3, IMAP4, Remote PowerShell, Exchange Web Services (EWS), the Offline Address Book (OAB), Exchange ActiveSync (EAS), SMTP AUTH, and MAPI (Figure 1). I can report that nothing untoward has happened since. Everything kept working and the world continued spinning.

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