Before embarking on an MX-Contact implementation, you need to verify that you have the required Exchange Server Version/Service Pack, Microsoft Outlook/Office environment, client operating system software and hardware.
Exchange Server Versions
Microsoft Outlook Versions

Exchange Server 5.5 Service Pack 3
Exchange Server 2000 Service Pack 2
Exchange Server 2003 Service Pack 1

Outlook 2000 Service Pack 3
Outlook 2002 Service Pack 3
Outlook 2003 Service Pack 1
Client Operating Systems Supported
MS Windows 98/98 SE
MS Windows NT Server/Workstation 4.0 with Service Pack 4, 5, 6a
MS Windows NT Terminal Server 4.0 with Service Pack 4, 5, 6a
MS Windows 2000 Professional/Server/Advanced Server with Service Pack 2

Client Hardware Required
The recommended hardware requirements for a networked computer running Outlook (with the MX-Contact Add-In), that accesses the main Exchange Server through a direct connection or wide-area network are as follows:

Operating System
RAM
CPU
Windows 98
64 MB
P I
Windows NT Workstation
96 MB
  P II
Windows NT Server
128 MB
  P II 400 Mhz
Windows 2000 Professional, Server, Advanced Server
128 MB
  P II 400 Mhz
Windows XP
128 MB
P II 400 Mhz