The banner will start rolling out during the last week of February, so a majority of users should see it by the end of that week. If you have auto app updates on, you'll see it during that last week; if you have them turned off, you'll see it once you update your app after next week. There will not be a notification taking them to the banner, it will appear at the top of the Home Feed starting that last week and when tapped will take the user to our blog post about the rebrand or if user clicks 'X' it will disappear for good. We are working on getting more visuals and details out about the changes user will see through the rebrand, that will be shared later this week. Users will still see the same features and functionality, just under a new app name. This update will happen automatically in mid to late-March. We will preserve the ability to search for "Yammer" in both the app store and on your device to get to the Viva Engage app. To make for a more smooth transition, we will also carry forward a reference in push notifications and in the app stores to Yammer until the rebrand is complete. Message Center post MC514981 will give more details around the Yammer mobile app and Communities app in Outlook experiences rebranding.