Only just getting round to posting this (2 weeks late), but KB 897614 Windows Server System software not supported within a Microsoft Virtual Server environment was updated on November 30.

The line that interested me the most was: ISA Server 2006 is currently supported running within Microsoft Virtual Server 2005 R2.

A snippet of the KB is below:

The following Windows Server System software is not supported within a Microsoft Virtual Server environment:

  • Speech Server requires telephony hardware not available in a virtualized hardware environment. Therefore, Speech Server is not supported when run within Virtual Server.
  • ISA Server 2000 is currently not supported running within Virtual Server.
  • ISA Server 2004 is currently not supported running within Virtual Server.
  • ISA Server 2006 is currently supported running within Microsoft Virtual Server 2005 R2.
  • SharePoint Portal Server is currently not supported running within Virtual Server. Support for SharePoint Portal Server within Virtual Server is expected in a future release.
  • Identity Integration Server 2003 is currently not supported running within Virtual Server.
  • The Identity Integration Feature Pack is currently not supported running within Virtual Server.


According the the Network Load Balancing (NLB) support team, NLB is not supported within a Virtual Server image.