This article describes how to use sign-in data to identify unused Entra ID registered devices. It’s an imperfect solution because Entra ID doesn’t log device information in many sign-in reciords. I’m sure there’s a good reason why Microsoft doesn’t capture the device information, but it’s a little frustrating, We have an imperfect and partial solution, but that’s better tha n nothing.
https://office365itpros.com/2024/03/14/entra-id-registered-device-mfa/
