My organization is running Windows 10 joined to Azure AD organization (completely cloud hosted, i.e. no on-prem Active Directory). I login to my PC with a username in the form of "firstname.lastname@example.org" with no issues and have enabled Remote Desktop connections to this PC.
If I attempt to Remote Desktop from another PC on the LAN or from home, my credentials are always deemed invalid. If I attempt to login using a local account (via RDP) it works just fine.
Can anyone suggest why Azure AD credentials do not work over RDP or how to enable this feature?