My father has just started a small firm (used to work in a big one), and he is wanting to get a 'server' (he is used to MS Exchange at his old firm). The main goal of the sever is to share calendar, contacts, files, host email, etc. He, and his partners, are all on PC, but I am a Mac person. If I set up a Mac Mini as a server (Snow Leopard Server), could the PC's even use it? I know this is a super-noob question, but I can't seem to find a definitive answer. I know it would be best to switch them to Macs, but its just not in the cards right now. Any ideas/help/thoughts would be greatly appreciated!