Hello all, is it possible to automate the solo function on Sonar 8.5? Many thanks!

No, not possible.

But you can automate Mute but you'd need to do this to ALL of the tracks you don't want to hear

Ouch, that's what I was afraid of. Thank you for your help! Much appreciated, -g

Or - you could split all the other tracks either side of where you want them to be muted and use the mute clip function

Or - if you already have any volume automation going on, you can reduce the volume to -INF during the part you want the other tracks to be muted.

You could even do this on a buss by buss basis to speed things up