Migrate from one RDS implementation to another

Hi,

Our current RDS implementation is on Windows Server 2012.
We built whole new RDS implementation on Windows Server 2012 R2.

We will need to migrate current collections to new RDS 2012 R2 implementation. Also we will need to add current RDVH 2012 servers to new RDS 2012 R2 implementation.

Can this be done, or we need to recreate everything on new RDS 2012 R2 implementation?
Is there some guides avaiable for this scenario?