Microsoft Windows Server 2003
Microsoft Windows Server 2008
Microsoft Windows Server 2008 R2
Microsoft Internet Information Server 6.0 or 7.0.
SMTP Virtual Server to send Alarms and Status to System Admin.
Web Server for Mailbox Administration and View Status Reports and Errors
Remote access - VPN Access to network and Remote Desktop to server.
MAC address of server to create a license key for Message Mirror.