Backing up remote Exchange Servers (2000/200) with NTBackup
How to Backup a remote Exchange Server on Windows 2000/2003 using NTBackup
If you want to backup one or more of your Exchange servers using NTBackup from a non-Exchange server or a server that does not have the Exchange Management Tools installed, you will need to install the Exchange libraries on the backup machine. BackupAssist should install the Exchange libraries automatically, but if this process fails you can carry out the following steps manually.
See
http://www.petri.co.il/backup_exchange_from_non_exchange_server.htm for full instructions.