Yammer Members not available to be added to Community

[klausmartin]

Hello, we have added some new Users to Azure / Teams and I now want to add those new Users to Yammer. For some reason I do not see these Users as members in Yammer. Is there a setting required in Active Directory or Teams to make them available in Yammer? 

Thanks. 

[#2]

They only show inside Yammer after they logged in the first time (at least this used to be the case)