Microsoft
Honestly I am very disappointed you are moving in this direction, I miss the days of a small simple interface like the old school Communicator, I want IM, Voice Call, Desktop share, to one or group, with conversations saved to my mail/server. All the 10 billion bloat features have their use but those are the features I use day in and out, I don't want or need a social network internally, even today Skype for Business makes half those items that use to be direct items two to three window clicks to do instead of a user list right click share desktop. We tried Slack and Teams, and it was fun for 30 minutes then it turned into a productivity drag, taking huge amounts of screen relestate, give us an option for a simple business use IM/call manager to save picking up phones, kicking off GoToMeeting etc.
