This is the same issue mentioned in bug 9052. I have tried the same test case with samba3.6.12 patched server. And here is the behavior.. setup and configuration: EAST.USA.MYDOM.COM: 10.199.10.22 created a User: Hemanth WEST.USA.MYDOM.COM: 10.199.10.23 created a Domain local group: east_users (made user Hemanth as part of this) Made samba server joined to WEST domain. # wbinfo -a=EAST_USA_MD\\hemanth%Password@123 plaintext password authentication succeeded challenge/response password authentication succeeded # id EAST_USA_MD\\hemanth uid=1792541994(EAST_USA_MD\hemanth) gid=1792541185(EAST_USA_MD\domain users) groups=1792541185(EAST_USA_MD\domain users) Here it did not list the domain local group east_users. But bug 9052 says this is fixed as part of 3.6.6.
Entered Some wrong data..