I'm very confused about DFSR and FRS when it turns to different windows server version.
If I have a DC with FRS, then once it migrated to DFSR, could it demote back to FRS?
If I have a domain in 2003 functional level, once I promote it to 2008 functional level, would the FRS migrate to DFSR automatically? Or should I do the migration manually?
I notice that in my 2008 R2 server(in a domain with 2003 functional level), both DFSR and FRS are started.Is it mean that the DC is using DFSR & FRS at the same time? If not, why are the two services both started?
Besides, I noticed in this wiki page,http://en.wikipedia.org/wiki/File_Replication_Service , it was announced that "In Windows Server 2003 R2 and Windows Server 2008, DFS Replication is available as well as the File Replication Service."
Does it mean that a 2k3 R2 DC is able to migrate from FRS to DFSR?
But in this blog:http://blogs.technet.com/b/qzaidi/archive/2012/01/16/quickly-explained-migrate-your-sysvol-replication-from-frs-to-dfsr.aspx
It tells that if you want to make a migration, "Your Domain Functional Level (DFL) must be set to Windows Server 2008 or higher i.e. no Windows Server 2003 or older domain controllers". But how could a 2k3 R2 DC keep in a domain with 2k8 domain functional level??????
And there seem to be another question : If requirement of migration is raising domain functional level, then is there any sense of raising domain functional level?(I mean that all of the function upgrade need to post manually although I have raised domain functional level)