What’s new in ADFS 2016?
You can upgrade an AD FS 2012 R2 farm using the “mixed farm” process described here. It works for WID or SQL farms, though the document shows only the WID scenario.

What’s new in ADFS 2016?
You can upgrade an AD FS 2012 R2 farm using the “mixed farm” process described here. It works for WID or SQL farms, though the document shows only the WID scenario.