Basic Authentication and Exchange Online – July Update

Two questions here.

1. What happens if Authentication Polices are in use, but there is no default policy set?

2. How does this tie in with using Conditional Access Policies in Azure to block Basic Authentication?

I agree with victorguo in creating a single page with the latest information on Modern Authentication, especially around the best way to disable it. There are multiple conflicting options to choose from and it is difficult to know which is best/preferred. For example, I have one tenant that uses Conditional Access Policies (because this seemed like the best way to do it from the documentation) and another that uses Authentication Policies (because they don't have Azure AD P1/P2 licenses).

Thanks for your consideration.