[Samba] Realm = or workgroup = ?

[Aaron_Colichia at Dell.com]

I think samba is cool.

I'm trying to understand the relationship between these 3 options:

Realm = MYGROUP.COM
Security = ADS
Workgroup = MYGROUP

And my samba file server is a member of AD

My server is W3K

Nothing seemed to work until I specified the realm

Do I also NEED the workgroup parameter ? 

Shouldn't the workgroup and realm parameters exclusive from each other ?

-aaron