If we are talking simply about users being able to access shares on a Samba server authenticated on Win2K environment clonny2 is not correct. You can do this using Samba just prior to version 3. There are instuctions on how to do this available. We have done it here in my office where we have a Samba/PostgreSQL RHat 8.0 machine and Win2k servers configured for ADS.
Good luck
Gary
A+,N+,I+