Adding this is in continuation of my earlier post. If you’re the admin for an organization that has an Office 365 commercial subscription plan that includes Office, such as Office 365 ProPlus, you can provide your users with early access to new features of Office 2016 for Windows desktops by opting into the First Release program. To get the earliest access to new features with First Release, your organization must be on Current Channel. These new features are provided in First Release for Current Channel builds. For more info, please refer the detailed documentation.
Note: If you’re an Office 365 Home, Office 365 Personal, or Office 365 University subscriber, then go to the Office Insider website to sign up and get Office Insider builds.
Hope this helps.