Apr 15, 2024 · Today, we are announcing that Exchange Online will permanently remove support for Basic authentication with Client Submission (SMTP AUTH) starting March 2026.

May 6, 2025 · Continued Support for Basic Authentication Today, we are announcing continued support for Basic Authentication in High Volume Email until September 2028. This decision …

Nov 16, 2022 · Last month we turned off Basic auth in Exchange Online for many customers. We’ve protected millions of users from the risks associated with using this legacy form of …

Dec 20, 2022 · In early January 2023, we will permanently turn off Basic auth for multiple protocols for many Exchange Online tenants.

Feb 25, 2020 · If you see Basic Auth being used by the client, it might be because Modern Auth is disabled in your tenant. If your tenant was created before August 1, 2017, that’s most likely it …

Oct 1, 2022 · If your email clients stopped signing in starting October (as we disable basic authentication in Exchange Online) - this blog post might help.

Sep 20, 2019 · We want your help in getting users to move away from apps that use Basic Authentication, to apps that use Modern Authentication. Modern Authentication (which is …

Starting on October 1st, 2022 we’re going to start to turn off basic authentication for specific protocols in Exchange Online for customers that still use it.

Jul 28, 2020 · Modern vs. Basic Authentication: Hopefully by now we don’t need to expand upon the virtues of Modern Authentication. Enabled by default for all new tenants since August 1, …

Sep 23, 2021 · Basic authentication (outside of SMTP) will be turned off for everyone in October 2022, including tenants who have previously opted out using our self-service tool. What if I …