Share Groupfolder to LDAP/AD Group?

Is it possible to share/assign a groupfoulder to a LDAP/AD group?

I’ve a working AD login and also working AD groups in NC 18.
When I create a new groupfolder (Settings->GroupFolders)
I’m able to select both local and AD groups. However the only groupfolders with local groups are shown to users. All groupfolder with AD groups won’t be shown to users.

Is this my fault at any point or just a bug in groupfolders?