Running Dell server, esxi 4.1 and SBS 2011. The server has been running great for over a year. On Tuesday at 5:15 users complained they couldn't connect. After a couple minutes all programs came back up and it was fine the rest of the night. Wednesday night the same thing happend around the same time except it happened twice. Thursday it happened once. Friday it happened once. Saturday it happened 4 times - once every 30 minutes. I ran all updates, there is no errors in the log, I can't find any task that is running just at that time, we could ping the router but could not ping the server. What else can I look for?
Thanks in advanced!