[Samba] default backend = rid not showing full group information for users

[miguel medalha]

>> That means that all user accounts will be shown by 'getent passwd' and 
>> all groups will be shown by 'getent group', it doesn't mean that 'id' 
>> will show every group a user is a member of. You can only be sure of 
>> getting a full list of a users groups if the user has logged in.

Well, 'id' is showing me ALL the groups every single user is a member of.
Even for users belonging to 5 or 6 groups. I just confirmed it and nobody is
logged in today. Like the OP, I use the RID backend.