Exchange 2000

Hello,

I am running Exchange 2000 on a Windows 2000 server. Sometimes the service will disconnect, then reconnect throught out the day. Then, there are days were the system completely restarts itself. Does anyone have any idea why or how this could happen? Any suggestions on how to correct this issue? We are in the process of upgrading the server and exchange, but this will take place until late Nov.

Thank You