Modern web UI is nice, but at the end of the day when it comes to mobile, apps are still king.
If the purpose of this is to replace the interaction we had on Yammer, a mobile app is a necessity...
Ivan I couldn't agree more. My involvement has gone from a 4-6 hours per day (old Office 365 Network on Yammer), to less than an hour per month. And this is 100% related to the fact that I can no longer switch networks and follow the conversations on my mobile. Being in a different timezone, I am never sitting at my office desk (web) at night when the US Microsoft team and collaborators are online. It's so sad.