Ans. Yes, it is recommended that you have a Microsoft account for your Office 2016 because it has some basic features that are required to activate your 2016 version, and also the home products which are been offered by Microsoft will not be accessible if you will not get an account. In addition, if you will not be having a Microsoft account then you will not be able to access some of the services that are provided like you will not be able to operate Outlook, drive, skype and Xbox Live as all of these applications are directly require access to the account.
If you don’t have a Microsoft account then you can work on a computer but a lot of applications will not respond and work to their best features. So, to not make anything buffering just make an account and then work effectively without issues.