On October 10, 2017, mainstream support will end on Office for Mac 2011. Upgrades are recommended prior to the support end date. Find details on technical requirements here
Office 2016 for Mac applications as part of Office 365 ProPlus
Office 2016 for Mac
We encourage customers to assess the Office 365 option with the help of their Microsoft account team and/or qualified Microsoft partner. With Office 365 ProPlus, users get the full, installed Office experience on PCs, Macs, tablets (including iPad® and Android™ tablet) and phones as well as OneDrive for Business online storage and Skype for Business. Moving to Office 365 enables customers to take advantage of the latest product innovations and ensure uninterrupted support from Microsoft.
Migration Assistance with FastTrack
Microsoft FastTrack services are available with an Office 365 ProPlus subscription and provide assistance to help customers move to Office 365 smoothly and with confidence, and realize business value faster. Customers can discover what's possible, plan for successful rollouts, and enable new users and capabilities at their own pace. Access best practices, tools, resources, and experts committed to making the customer experience with Office 365 a success.
You forgot to mention this includes removing 2011 from the activation servers. Fraudulant Mac for home and business is a product still being sold on the market. Why would MS prevent activation of product keys if it is still being sold on the open market?