Basic Authentication retirement in Microsoft 365 Apps
Microsoft 365 Apps are disabling server sign-in prompts using Basic authentication in Office Apps. We are making this change because basic authentication is a legacy authentication method that sends a username and password with each request. As a result, an attacker can access these credentials and use them to access resources. Continued use of Basic Authentication is a big security concern, so we have decided to deprecate it from all tenants.
We will retire this feature in Office Apps version 2209+. Instead, we recommend moving to a more secure authentication method, preferably Modern Authentication, and enabling multi-factor authentication based on OAuth2.0 token-based auth.


HANDS ON tek
M365 Admin







