Hi ACAD,
Good day!
If they experience a certain IP Block getting blocked by a 3rd party, raise a support incident (or we can offer one)
Also say anyone can report abuse of MS IPs here: MSRC reporting portal (microsoft.com)
If you have any further concerns, please do not hesitate to contact us. We are pleased to help you.
If the information is helpful, please click on "Upvote" and "Accept Answer" so that it would be helpful to other community members.