SEPM 12.1.6 MP3 old client support

Hi

I have been having trouble tracking down a KB article that lists all older SEP client that is supported by the new SEPM 12.1.6 MP3.

If someone could kindly attach a link here, would be much appreciated.

Basically, trying to find out if the latest version will support clients all the way down to 11.x.

Thanks,

DM