We've upgraded all of our workstations, clients and Servers to Director 4.21 (WIn XP workstations, Win2003 server). Now, we have a group of workstations that all show up as unavailable when they ARE turned on. If I go and reset the computer, they will show up but some time over night they will show as offline. Could it be the Network Timeout setting on the workstation agent? ALSO, when I come in in the morning, I see a lot of workstations unavailable in my console. If I restart the server support service, most of the systems become available (not the ones I spoke of above). Any ideas?