• Uninstalled Office trial edition. • Uninstalled the 'Get Office' app. • Verified that the two Registry Keys you referenced still exist. • Installed Office Standard volume license edition. • Started Word to verify the trial version Activation Popup (it does).
Office 2016 For Mac Update History
Additionally, to update Office 2016 application manually, please open any Office 2016 application, choose File > Account > Update Options > Update Now. Regards, Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If an update is available for your version of Office, you'll see a link to a website with more information about the update. Early access with Office Insider You can join the Office Insider for Mac program to get early access to the newest Office innovations. Microsoft Office used to demand manual updates. Users periodically ran the program 'Windows Update,' which searched the Internet for the updates. Microsoft has since revised Windows Update, which now finds, downloads and installs program updates without any user action.
For instance, when you know that a specific update is degrading Office performance and experience, you can uninstall the update and disable Office updates until Microsoft releases a new update address the issue. 
Turning off updates is only option if you don’t want Office 2013 from automatically updated to Office 2016 (installed as part of Office 365 subscription). Turn off Office updates without disabling Windows Update If for whatever reason you want to stop Office updates, you can do so without actually disabling Windows Update service as will stop Windows operating system from receiving new updates and is definitely not a good idea. While we recommend keeping automatic updates turned on for Microsoft Office, those of you who prefer to disable updates for any reason can follow the given below directions to disable updates.
Not helpfull, the link directions still require a sign in. To activate your copy of Office 2016 for Mac you’ll need to visit Office.com/setup and follow the next steps: Step 1: Obtain a Product Key from your MSDN portal, copy the product key.