Created a UTM from a desktop. At first it was Untangle, then ClearOS then later still, settled for Zentyal.
Purchased Blade server and configured Windows 2008 Server R2 and used the built-in Hyper-V to maximize system usage and licensing which serves Windows 7 Professional clients. Servers act as Domain Controller configured with Active Directory, Group Policy, DNS, DHCP, WSUS, file and print server. Connect clients to DC.
Also tasked to manage Symantec antivirus and firewall policy through SEPM.
Since being the lone IT, contracted email services from service providers. Initially, it was hosted with the web server but wanting more robust solution, we contracted Online Exchange.