USING THE ICE INSTANT MESSAGING

Good day

I am using ICE instant messaging and would like to add this account to my Messages (in my MacPro).

Is it possible ? If so , how I do that ?

Because when I was using Yahoo, it was easy, as we can add Google, Aol and Yahoo directly.

But I don't know how to add The Ice.

I have a MacBook Pro (Retina, 15-inch, Mid 2015), Processor 2.5 GHz Intel Core i7, Memory 16 GB 1600 MHz DDR3, 499.06 GB (free 209) , OS X El Captain Version 10.11.6 (15G31)

Messages version : 9.2

Thanks for your support,

Suyin