Yammer died the minute that acquisition went through. I was working on a data compliance tool for Yammer at the time, and my employer had a handful of large enterprises lined up to purchase it. When the news broke that Microsoft had bought them, they all went noop and abandoned Yammer.

Four years later, Yammer looks exactly the same, and the data access API that I was using, which was supposed to be facing imminent deprecation, is still there.

> Yammer died the minute that acquisition went through.

Somewhat comically yammer was just rolled out to my company this year. Perhaps we got free licensing for it. I'm not sure.

For offices with mostly remote users slack or even yammer might be a great option for dialog. I'm in the email camp for a running dialog of well thought out replies or a group IM for rollouts or some other conversation that can't be done face to face.