Open System Preferences and Network
Click the lock if not unlocked and click the + to add new
Change:
Interface to VPN
VPN Type to PPTP
Service Name: MCGB
Enter Server Address: mail.mcgb.com
Account Name: yourusername
Check “Show VPN status menu bar”
Click Authentication Settings
Enter office password
Click OK and Apply
Click VPN in status bar and “Connect MCGB VPN”
Download and install Remote Desktop Connection for MAC
http://www.microsoft.com/mac/remote-desktop-client