Hi There,
This was the situation on august 2021:
-There is no way to provide external users access to AVD at this time.
The users will have to be a part of the ADDS domain to have sign on rights. What could be done is if you used ADDS for internal and created a Azure AD DS domain for "external" users but there would still be Azure AD users with no support for B2B or guest users.
Has this changed?