I found an official Microsoft list of common domains/endpoints that are pinged in Windows 11, and what they do
All domains connected to a Microsoft tenancy
Windows Update - Official List of IPs or Domains
https://docs.microsoft.com/en-us/windows/deployment/update/windows-update-troubleshooting#why-am-i-offered-an-older-updateupgrade
About halfway down.
More on reddit.comHow to whitelist Microsoft domains
I look at the query log in the web interface and then look at what was Pi-Holed and then hit the Whitelist button.
More on reddit.comHi
I don't know if this is expected behaviour but today I setup an Organization sharing relationship in the Exchange admin centre. After having typed in the domain of the company that I wanted to create the relationship and saving the entry I was very surprised to see all of the domains attached to that tenancy including the onmicrosoft.com domain.
I didn't know this was possible and I am struggling to understand how this can be expected behaviour. In order to satisfy my curiosity I setup a relationship with Microsoft.com and would you believe that I now have the full list of the 290+ domains attached to Microsoft's own tenancy.
This seems like a little bit of a security risk right? Why should I be able to see this level of detail?