Yep. I see that now in the FAQ...but it is at the very bottom of the blog post. I didn't read the entire post (and i bet many didn't either).

This FAQ element seems to counter info provided at the top of the blog: "The system is designed to alert an admin about unsupported or unpatched Exchange servers in their on-premises environment that need remediation"

The wording (at least to me) implies that it is between my on-premises server and my tenant.  I know it doesn't say that explicitly, but it also doesn't say the opposite...so left to interpretation.

Only as a feedback point...i think this FAQ element should be a leading point and not buried at the bottom.  The context of that point should be in the first few paragraphs, in my opinion.

I'm in agreement with the approach and need, so it's not a complaint...but i think many will miss this important fact since it will affect both the sender and receiver.