I was looking for this information recently and had a hard time locating it – probably my poor searching skills!  Nevertheless, I found it again so am posting it on my blog so I can always have it close!  The information comes from http://technet.microsoft.com/en-us/library/bb693755.aspx

The following features are not supported when clients are managed on the Internet:

  • Software distribution that is targeted to users (either directly or through Microsoft Windows security groups).
  • Branch distribution points (a branch distribution point cannot support Internet clients, and clients on the Internet cannot be configured as a branch distribution point).
  • Client deployment over the Internet.
  • Auto-site assignment.
  • Network Access Protection (NAP).
  • Wake On LAN.
  • Operating system deployment.
  • Remote control.
  • Out of band management in Configuration Manager 2007 SP1.
  • The client ping functionality used with the client status reporting feature in Configuration Manager 2007 R2.