Hello - we have a single Exchange 2003 Server running on Windows 2003 Server, and late Friday, it dropped off the network and stopped allowing connections to the server. Upon getting onto the console onsite, I found the server was running, and I could log onto the desktop - but was un-pingable from the network. I rebooted it, and everything started working again. I am seeing that at 6:01P Friday, it started repeating an MSExchangeAL Event 8026 error, which looks to be an error related to "demoting an AD server" using DCPROMO, which was not the case here. Yet it's reporting this error continuously from 6:01P 5/24 and on. Nothing was changed in any way with the domain AD controller, or in any other way on the network, so this is very strange. Any help would be appreciated in understanding what happened here.