I am wondering how ADFS sets or uses to determine the locations. The Intranet and Extranet locations do not seem to affect machines internally.
In Authentication Policy, if I set Extranet location or Unregistered devices, I get MFA prompt from outside.
If I just select Intranet location, I do not get MFA prompt from outside. This tells me the Extranet location works from outside.
Selecting all or any options, I cannot get MFA prompt from inside.