Agreed. Hard to believe I am saying this, but I think some look for a simple IM for their network, then find several that can do what Yahoo does and more. These can be nice but a lot are very tempting for staff as they can end up messaging friends, linking to Facebook and even doing Twitter and snapchat
But, not knocking them. To each his/her own. If they had been available ten years ago, I may have used them.
If anyone does want to try IPMsg (and I would like to hear Steve's view on this), I have an earlier version, which I think is much better. It also has Bert's special instructions on how to set up. One of the nice things about IPMsg, is it only saves to one log -- a text file on the server. And, only one person really needs to know where that is.