Azure AD registered devices store some information about the operating system and version used when registration occurs. Although this information changes over time and isn’t updated by Azure AD, it might be of some interest and use to tenant administrators, so we show how to report it here. If you want accurate information, you’ll need to use Intune.
Entra ID registered devices have 15 extension attributes that tenants can use for their own purposes. In this article, we explore how to use the Microsoft Graph PowerShell SDK to update extension attributes for registered devices, and even better, access the content in the extension attributes afterward.