https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=38338 --- Comment #54 from Caroline Cyr La Rose <caroline.cyr-la-rose@inlibro.com> --- Updated timelines from https://techcommunity.microsoft.com/blog/exchange/updated-exchange-online-sm... Now to December 2026: SMTP AUTH Basic Authentication behavior remains unchanged. End of December 2026: SMTP AUTH Basic Authentication will be disabled by default for existing tenants. Administrators will still be able to enable it if needed. New tenants created after December 2026: SMTP AUTH Basic Authentication will be unavailable by default. OAuth will be the supported authentication method. Second half of 2027: Microsoft will announce the final removal date for SMTP AUTH Basic Authentication. So we have a bit of time. But anyone who can get their hands on a tenant ID is welcome to test! -- You are receiving this mail because: You are the assignee for the bug. You are watching all bug changes.