I'll give you my suggestions based on a mini version of the configuration I've been using for a couple years (except for the dropbox part which I just started u

I'll give you my suggestions based on a mini version of the configuration I've been using for a couple years (except for the dropbox part which I just started using this year). This is only for Windows but most works on Mac and Linux... 1 Windows Server for Authentication, DHCP and DNS. Unless your users will be off campus for extended periods of time (30+ days) you don't need to worry about a VPN (since the local system will authenticate their account disconnected) Dropbox for Teams on all systems. On Windows systems you can move the Desktop, Pictures, and Documents folders right into the Dropbox folder to sync and backup all files (Box.Net is an option with more features but I had massive problems with it to the tune of 80% of users and the company didn't seem to care) Faronics DeepFreeze is a program that freezes the system files for Windows systems. By creating a separate partition for files you can freeze the whole system and avoid problems (just create a files partition and move dropbox and the users files to there). You can also set times for unfreezing for updates (I set it for Sunday at 1am and have the auto updates run at the same time). Macs and Linux can ususally take care of themselves on the security front Patch Management with GFI Languard is cheap and doesn't require a whole infrastructure to work with. For updating software you can used a Powershell script and a shared "Updates" folder in dropbox to distribute MSI files On E-mail I use Rackspace's hosted exchange because my users were used to an Exchange server. But you could just as easily get by with Google Apps. AntiVirus I just use Trend Micro's corporate version but it does have a fairly small server footprint. It could easily run on the one Windows server you have. Hope it helps. Feel free to e-mail if you have questions