[Samba] groupmap for Domain Admins only works for primary unix group

[G Emery]

Hi all,

Just wondering if anyone can help me with this:

When using the command:

net groupmap modify ntgroup="Domain Admins" UNIXgroup="mygroup"

It only works if the user's primary group is "mygroup", not if the user 
is a member of the group as defined in the groups file.

Hope that makes sense,

Gareth