This is weird. One of our customers has three 2003 Standard Edition Servers for about 2 years now. One of the servers on the domain is all of a sudden requiring activation again. I went to logon to it this morning and it won't let me log on until I activate it again. So, I went through the paces just to see what would happen, and all it tells me is that it is unable to activate online.
I suppose that I will have to call microsoft, but does anyone know why this would suddenly happen? Everything has been fine up to this point.