I am having a problem with workstation registration / removal.

I have my workstation removal policy set to remove workstations after 8 days.

Registration seems to be working fine. If I put a new workstation on the
network, an object gets created, but after 8 days, the removal service
deletes it.

It seems like after the initial registration/import, the workstation never
talks to the server again.

Has anyone seen this sort of behavior?