Manually assigning an Azure AD group to an Employee

Hi.

I would like to assign members to a busness role and a Azure group to the same role, but nothing happens. When I try to do that manually I get the following error message:

[810306] Error during execution of 'OnSaving' in logic module 'AAD.Customizer.AADUserInGroup'.
[2552002] Assigning user Jane Doe as a member of group ACME complaints failed.
Memberships of user type Member in groups MailEnabled are not valid.

How am I supposed to add members automatically to a Azure group? When its unified I can do it, but we don't want to create unified groups in this scenario.

Please advise.

Br

Henrik

PS. We're running Identity manager 8.1.2