I have a VM that was creating via the vsphere client. I selected Windows 2003 Server Enterprise 32 bit as the template. I ended up using a R2 release version, however, not sure if that matters for when selecting the Os type I didn't see an option for R2. I tried creating a VM from an existing template I created and one from scratch and I get the same symptoms... After running for about 5 days it drops off the network. The VM is responsive at the console, however, it can't see the network. It's a DC and a certificate server. I tried re-creating the VM three different times and got the same results. If I enable/disable the NIC it doesn't fix it. I also tried different NIC cards. I have to reboot to get it to work after dropping off of the network.. Any suggestions?