I'm trying to figure out if to get granular backups and restores for exchange 2007 on NB6.5.3 to work, do you need a Windows media server?

The documentation is a little unclear as to what is exactly needed. In this exftpp.symantec.com/pub/support/products/NetBackup_Enterprise_Server/305408.pdf on page 29. It states:
    If you want to perform individual item restores with Exchange Server 2007 or 2003 on Windows 2003 R2, you need to install Microsoft Services for NFS on the Windows media server(s). (A supported non-Windows media server does not require any additional installations.)

What exactly is a "Supported non-windows media server"? Does exchange only support certain media servers (cant find any compatibility guides related to this)? Or is it just referring to supported media server OSs in general?

The issue is that I have a Solaris10 media server i was planning on using for exchange backups.  I have a windows media server that is brand new and sitting in our prep area if i absolutely need it, but i would prefer to use that server for it's original intentions.

Thanks for any information,
Matt