adding users to the workspace without adding them to active directory

[Agam]

I have created a 365 user group on MS admin centre. As I am the owner I can add users in the group directly using Outlook too. Earlier I was able to invite externals to the group, which was automatically adding them to the Active Directory. 

Now I am unable to add any external without adding them to the Active Directory.

Is there any update on this? Has MS updated these settings?

[SqlBobScot]

External users have to added to Azure Active Directory, I do not think its possible otherwise.