For one of the projects I'm working on, the site currently has a workgroup of around 15 PCs (XP/Vista/7- these are employees' own computers) and one file server running Server 2008.
They use externally-hosted email (accessed in Outlook via IMAP) but would like an Exchange server in order to centralize Outlook contacts/calendar info, get mobile syncing via Exchange ActiveSync, and perhaps add web access via OWA.
Can Exchange be set up in a workgroup, or if I set up a domain with the new Exchange server (or SBS, whic might be a more financially viable route), or the current file server, as a PDC, would that work (given that most of the clients are running Home Premium OSes)?
The only constraint is that configuration changes on the clients should be limited to Outlook if possible (e.g. I can't have them all switch to Business edition OSes).