Hi, I don't want to 'spam' the existing topic for the LDAP Plugin with my current issue, since I think, the existing Topic is already hard to follow...   I have setup an Samba4 Server and configured the LDAP Plugin for the User-Login accordingly. The whole User-Search Filter is: (&(sAMAccountName={0})(&(objectCategory=user)(!(userAccountControl=514))(memberof=cn=emby-users,OU=Groups,OU=Home,DC=home,DC=caina,DC=de)))   All of this is working fine - My AD Structure is like this: