I'll need to echo some of the other comments here - at work we're pretty much stuck with Skype for Business (aka "lync") because the voice system ties into it.

I'll need to echo some of the other comments here - at work we're pretty much stuck with Skype for Business (aka "lync") because the voice system ties into it. When I suggested Discord, it was shrugged off because it's "Chat for Gamers" and clearly they're not going to budge from that niche anytime soon, from all the recent features I've seen.