Crash

So we didn't finish the North of the Border Trial today as I had hoped. Summations will be Monday, which means a stressful weekend. Even worse, my Microsoft Exchange Server crashed at the office today, and my tech guy tells me that I've probably lost all my data. I thought this stuff never disappears... So do I start from scratch, hire a data recovery team, or try to recreate what I can from different places? UGH!!!!!