Posted inMicrosoft 365 suite
Posted inExchange Online
(Updated) Exchange Online to retire Basic Auth for Client Submission (SMTP AUTH) [MC786329]
Message ID: MC786329 (Updated) Updated June 12, 2025: We have delayed the Basic Auth removal from SMTP AUTH Client Submission to begin March 1st 2026 and complete by April 30th 2026 in order to give customers more time to adopt…










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