[BrokenBES]

I'm running BES 4.1 Enterprise for Exchange on Windows Server 2003. About every 12 hours I get a Netlogon Error (event 5719) accompanied by a SRV error (event 2019) causing the server to lock up. A reboot works for about 12hours until it happens again. Here is the weird part.. I just stood up another BES server about 2 weeks ago and it worked great up until tonight. I've got 2servers thats doing the same exact thing. Has anyone run into this in their environment? Thoughts?