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Microsoft is removing support for basic authentication for Microsoft 365 and Exchange Online. Basic authentication for SMTP will cease in September of 2025. Microsoft is switching to OAuth 2.0. Without basic authentication app passwords will not be an option, which are currently used to send messages, services calls, invoices, etc. from within e-automate.

https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online

https://techcommunity.microsoft.com/blog/exchange/exchange-online-to-retire-basic-auth-for-client-submission-smtp-auth/4114750

https://learn.microsoft.com/en-us/lifecycle/announcements/basic-auth-deprecation-exchange-online