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Thus, starting March 1, 2026, Exchange Online will begin phasing out Basic authentication for sending emails via SMTP AUTH. At first, fewer attempts will be blocked, but by April 30, 2026, this ...
Basic Auth is an outdated authentication method where a user's credentials are sent in plaintext or base64 encoded form with every request to a server. It lacks modern security features like MFA ...
The outdated Exchange Online basic auth login method will be deprecated for Exchange ActiveSync (EAS), POP, IMAP, Remote PowerShell (RPS), Exchange Web Services (EWS), Offline Address Book (OAB ...
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