Join an ADFS 2.0 server to ADFS 3.0-farm

Hi there,

we startet using ADFS with an on premises ADFS 2.0-server running win2012. Now we migrated to an azure-server that runs win2012 r2. I deployed ADFS completely with a new farm configuration running ADFS 3.0. Now I wonder if I can join our "old" on premises-server to the new farm configuration. I'd like to do load balancing between those two servers.

Is that a supported configuration or do I have to upgrade/renistall the old ADFS-server, so that it also runs ADFS 3.0?

Thanks and regards

Marcel