Since April I have been using IP Virtualization using a IP Pool set in the registry instead using a DHCP server and it was working fine. Since last week the servers that I had it enable on will not issue a IP after all have been issues on list but not in use. Let me explan, what will happen now is that when the first user gets an IP address it will not release that IP after the user has logged off. I looked through the event viewer logs and it says that it releases the IP but never issues that IP again until I reboot the server. I tested this on one my servers with IP virtualization enabled and after it has gone through the list it will not issue another IP address from the pool, unless I reboot the server.
I have tried removing all registry entries, remove the RDS role from the server, uninstall any patches from the date when we started to see these problems. But it is still not working the way it was. I also tried clearing the Winsock catalog but that didn't work either. Does anybody know any process or registry entry that may fix this or any logs that I can look at to se what may be causing the problem? Also the RDS servers are virtualized in Hyper-V