To allocate a workstation to the resource tree,
1) Log in on that workstation with the "Admin" user, and do Home=>station preferences=>get the station name
FYI - by logging in as Admin, you bypass the enterprise control center and can log in.
2) on any other client, login as the Admin user and do Home=>configure system=>Enterprise Control center
In the control center, hit "Edit locations & Allocations"
3) go to the stations, find the station, and click on the >> to move it to the location in the tree you want.
In the sample below, I'm moving it to the San Jose location.
Same with users. Select the user and move user to the location you want.