[Samba] Force Winbind Domain

[Diego Lima]

Hi all,

Is there any way to force Winbind to auhenticate against a certain
domain even if another was specified? I'm currently having problems
authenticating some users on squid as they seem to inform the wrong
domain. I can see messages like these on my cache log:

Login for user [PROXY1]\[USERNAME]@[WRKSTATION] failed due to [No such user]

The problem is that our domain is not called proxy1 (that is our proxy
DNS name) and we can see some (not all) users unable to authenticate
due to this. So my question is, can I force the domain to be MYDOMAIN
instead of PROXY1?

Thank you!

-- 
Diego Lima