I run a Windows 2000 Server domain with 30 clients. I have SBS2003. Can I upgrade the server portion only without adding the other components like exchange? If I do install exchange can I put it on another partition? My concern is that my C partition is 8GB with only 4GB of it free. SBS2003 states it needs 5GB free for an upgrade with all components. My total hard drive size is 80GB with 50GB free. Unfortunately I allocated too much to my data and application partitions. My boss would like exchange eventually. I would at least like to upgrade the 2003 portion asap.