[Samba] "net groupmap add" questions

[Ilia Chipitsine]

ok, just to make it clear ...

1) what does "net groupmap add" do ?

2) can it be used with ldapsam ?

3) if I have local unix group and I want to create new domain group mapped 
to that unix group... do I have to explicity specify SID ? can anyone give 
me an example of correct usage "net groupmap add" ?

4) what "type" (local|domain|builtin) should I use in such case ?

5) how does it work ? by calling "add group script" command or not ?

Cheers,
Ilia Chipitsine