Hello, Recently I had 2 machines crash. Both were ISA servers. The external machine was in firewall mode only. The internal ISA was setup as integrated and included in active directory. I don't know why the ISA machines crashed! Looked like possible boot sector virus on both machines. They were built in June. At any rate. Is there a way to easily get the internal machine back into the ISA Array in active directory? I keep getting the message that Internet acceleration server is unable to install definitions into active directory. I've been offline for about 1 week now. Good thing for another machine to get email! Any clues. You would think that it would be easy to install or uninstall stuff form active directory without issues. Joseph