Exchange Online to retire Basic Auth for Client Submission (SMTP AUTH)

Exchange Online will retire Basic Auth for Client Submission (SMTP AUTH) in September 2025. Users must switch to OAuth or other alternatives before this date, as applications using Basic Auth will no longer be supported. Steps to prepare and alternative options are provided.

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I've been working with Microsoft Technologies over the last ten years, mainly focused on creating collaboration and productivity solutions that drive the adoption of Microsoft Modern Workplace.

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