Hi all: I have had several workstation over the last few months that simply drop out of ZCM. From the local machine they will will list the ZCM server, DNS and Address as "unavailable". I try to re-register the workstations but that fails with a message saying the computer is already registered. If I un-register the machine and then try to register it anew it will register to zone unknown. At this point I have been simply re-imaging the computers as they still seem to work with PXE and the imaging engine.

Can someone explain what could be going wrong? How can I fix the workstations short of re-imaging?

Thanks, Chris.