I found these instructions on Microsoft's support site. - Not sure if I am allowed to post them here...
Remove Office 2016 for Mac applications
From Microsoft support page - https://support.office.com/en-us/article/Troubleshoot-Office-2016-for-Mac-issues -by-completely-uninstalling-before-you-reinstall-ec3aa66e-6a76-451f-9d35-cba2e14 e94c0
Step 1: Remove Office 2016 for Mac applications Open Finder and click Applications. Command +click to select all of the Office 2016 for Mac applications Ctrl+click or right-click the applications you selected and click Move to Trash. Upgrade to Office for Mac (subscription version): If you're a volume licensed customer of Office 2016 for Mac or Office 2019 for Mac, you can upgrade to Office for Mac (available with certain Office 365 or Microsoft 365 plans) without uninstalling your current version. First, download and run the license removal tool. Second, launch Microsoft. In this tutorial we’ll show you an easy way to remove the existing product key registered with your Microsoft Office 2019 / 2016 / 2013 application. Part 1: Check the Office License Status. To get started, open the Command Prompt as administrator. Navigate to the Microsoft Office program folder using the cd command. The subfolder varies.
IMPORTANT Follow the steps in this article only if you've tried the usual Office for Mac uninstall process and are still having difficulty reinstalling or starting Office applications.
To completely uninstall Office 2016 for Mac you must remove the applications, supporting files, and keychain entries, plus any icons you've added to the Dock. Once you've removed everything, empty the Trash and restart your Mac to complete the process.
You must be signed in as an administrator or provide an administrator name and password to complete these steps.
There are several things to remove. This article steps you through each one.
Office 2016 Mac License Removal Tool Replacement
Step 1: Remove Office 2016 for Mac applications
- Open Finder and click Applications.
- Command +click to select all of the Office 2016 for Mac applications
- Ctrl+click or right-click the applications you selected and click Move to Trash.
Step 2: Remove supporting files from the Library and User folders
Remove files from the Library folder, you'll need to first set the Finder View options.
- Open Finder, click Go > Computer, and then click View >as Columns.
- Go to Macintosh HD > Library > LaunchDaemons.
- In the LaunchDaemons folder, ctrl+click or right-click this file if present, and then click Move to Trash.
com.microsoft.office.licensingV2.helper.plist (if present)
- Go to Library > PrivilegedHelperTools, ctrl+click or right-click this file if present, and then click Move to Trash.
com.microsoft.office.licensingV2.helper (if present)
- Go to Library > Preferences and ctrl+click or right-click this file if present, and then click Move to Trash.
com.microsoft.office.licensingV2.plist (if present)
Remove files from your user Library folder
To remove files from your user Library folder, you'll need to first set the Finder View options.
- In Finder, press +Shift+h.
- On the Finder menu, click View > as List, and then click View > Show View Options.
- In the View Options dialog box, select Show Library Folder.
- Switch back to Column view (+3) and click <YourUserName>Library > Containers and ctrl+click or right-click each of these folders if present, and then click Move to Trash.
Office 2016 Mac License Removal Tool
5. Switch back to Column view (+3) and click <YourUserName>Library > Group Containers and ctrl+click or right-click each of these folders if present, and then click Move to Trash.
Step 3: Remove Keychain Entries
Open Finder > Applications > Utilities > Keychain Access and remove the following password entries:
2. Search for all occurrences of ADAL in the keychain and remove all those entries if present.
Step 4: Remove Office 2016 for Mac icons from the Dock
If you added Office icons to the Dock they may turn into question marks after you uninstall Office 2016 for Mac. To remove these icons, control+click or right-click the icon and click Options > Remove from Dock.
Step 5: Restart your computer
When you've removed all the files listed in this section, empty the Trash and restart your computer.
If you plan to reinstall properly See Also
Nov 8, 2015 7:10 PM
-->We recommend that you uninstall any previous versions of Office before installing Microsoft 365 Apps. To help you uninstall versions of Office that use Windows Installer (MSI) as the installation technology, you can use the Office Deployment Tool and specify the RemoveMSI element in your configuration.xml file.
There are several ways that you can use the RemoveMSI element when installing Microsoft 365 Apps.
- Uninstall all Office products on the computer.
- Identify any existing language resources, like language packs, and install the same languages.
- Keep some Office products and uninstall all other Office products on the computer.
RemoveMSI can be used to uninstall 2007, 2010, 2013, or 2016 versions of Office, Visio, or Project that were installed using Windows Installer (MSI).
Note
RemoveMSI doesn’t uninstall prior versions of Office, including Visio and Project, that use Click-to-Run as the installation technology. You can uninstall those versions of Office through Control Panel or by running the Office Deployment Tool and using the Remove element in your configuration.xml file.
Requirements for using RemoveMSI
The following are requirements for using the RemoveMSI element in your configuration.xml file:
- You must be using at least version 16.0.12827.20268 (setup.exe version 16.0.12827.20258) of the Office Deployment Tool, which you can download from Microsoft Download Center. We recommend that you always download and use the most current version of the Office Deployment Tool. To check the version of the Office Deployment Tool, right-click on setup.exe, choose Properties, and then choose Details.
- You must be installing at least Version 1803 of Microsoft 365 Apps. Version 1803 or later is available in Current Channel, Monthly Enterprise Channel, Semi-Annual Enterprise Channel (Preview), and Semi-Annual Enterprise Channel.
- You must be installing Microsoft 365 Apps on a computer running at least Windows 7 Service Pack 1 (SP1) or above.
Note
Support for Windows 7 ended on January 14, 2020. For more information, see Windows 7 end of support and Microsoft 365 Apps.
Uninstall all Office products
To uninstall all versions of Office, including Visio and Project, that are already installed on the computer, add <RemoveMSI /> to your configuration.xml file. Language resources – for example, language packs, language interface packs, or proofing tools – will also be removed.
Here’s an example of a configuration.xml file that installs the 64-bit Current Channel version of Microsoft 365 Apps for enterprise in English from the Office Content Delivery Network (CDN) on the internet and uninstalls any Windows Installer (MSI) versions of Office on the computer.
Install the same language resources
If there are language resources – for example, language packs, language interface packs, or proofing tools – already installed on the computer, you can get Click-to-Run versions of the same language resources installed when you install Microsoft 365 Apps. To install the same language resources, add <Language /> to your configuration.xml file.
Here’s an example of a configuration.xml file that installs the 64-bit Monthly Enterprise Channel version of Microsoft 365 Apps for enterprise in English, along with any existing languages on the computer, from the Office Content Delivery Network (CDN) on the internet and uninstalls any Windows Installer (MSI) versions of Office on the computer.
The following are some additional details about using MatchPreviousMSI in your configuration.xml file.
- You must include the RemoveMSI element.
- You must specify at least one language ID. For example, en-us.
- The setting isn’t product specific. For example, if Office Professional Plus 2013 in French and Visio Standard 2013 in German are installed, you will get both French and German, along with any other language IDs you have specified, when you install Microsoft 365 Apps.
Important
If you’re installing Microsoft 365 Apps from a location on your local network, such as a shared folder, make sure you’ve downloaded all the possible language files to that folder. If any of the languages needed to install aren't available in that folder, the installation will continue but without those languages being installed. To avoid this situation, we recommend that you include AllowCdnFallback='True' in your configuration.xml file. This will use the Office Content Delivery Network (CDN) on the internet as a backup source from which to install the language files.
Keep some Office products and uninstall all other Office products
We recommend that you uninstall any previous versions of Office, including Visio and Project, before installing the newer version. But, in a few cases, such as for application compatibility testing, you might need to keep a previous version installed for a limited time while you transition to the new version.
To keep a particular Office product, you add an IgnoreProduct line to your configuration.xml file and you specify its product ID.
The following are examples of supported IDs for Project and Visio:
- PrjStd
- PrjPro
- VisStd
- VisPro
- PrjStdR
- PrjProR
- VisStdR
- VisProR
Note
The product ID is the Setup ID that is found in the Setup.xml file in the {product}.WW folder of the installation files for your previous version of Office. For example, the Setup.xml file for Office Professional Plus 2010 is found in the ProPlus.WW folder.
The ID isn't version specific. All versions found on the computer will be kept. For example, if you specify VisPro, both Visio Professional 2016 and Visio Professional 2013 will be kept. Language resources for those versions are also kept. For example, language packs, language interface packs, or proofing tools.
Only full product removals are supported. For example, if you have Office Professional Plus 2013 installed, you can't uninstall everything except Excel. You either must keep or uninstall the entire product. You can only keep a previous installation of Excel if it was installed as a standalone product, not installed as part of an Office suite, like Office Professional Plus.
Here’s an example of a configuration.xml file that installs the 64-bit Monthly Enterprise Channel version of Microsoft 365 Apps for enterprise in English from the Office Content Delivery Network (CDN) on the internet and uninstalls any Windows Installer (MSI) versions of Office, except for Visio Professional, on the computer.
Other products that can be removed
Installations of the following products will also be removed by using the RemoveMSI element unless you use IgnoreProduct:
- SharePoint Designer. The product ID is SharePointDesigner.
- InfoPath. The product ID is either InfoPath (for volume licensed versions) or InfoPathR (for retail versions).
- Lync 2013 or later. Note that Lync 2010 can't be removed by using the RemoveMSI element.
- Office products that were installed separately and not as part of an Office suite. For example, a standalone installation of Access.
- Access 2010 Runtime or later. The product ID is AccessRT.
- Access Database Engine 2010 Redistributable or later. The product ID is AceRedist.
Note
Access Database Engine is most commonly included as part of other applications which are interacting with Access data sources, and uninstalling Access Database Engine could impact functionality of these applications. Before removing Access Database Engine, ensure that any applications which require this component are removed or no longer needed.
Additional information about using RemoveMSI
The following are some additional details about using the RemoveMSI element in your configuration.xml file.
- You can also use these settings if you’re installing any of the following products:
- The subscription version of the Project desktop app that comes with Project Plan 3 or Project Plan 5.
- The subscription version of the Visio desktop app that comes with Visio Plan 2.
- Microsoft 365 Apps for business (previously named Office 365 Business), which is the version of Office that comes with some Microsoft 365 business plans, such as Microsoft 365 Business Premium.
- A volume licensed version of Office 2019, such as Office Professional Plus 2019.
- User settings, preferences, and documents are retained, even if you’re uninstalling all Office products.
- You can use the RemoveMSI element in conjunction with the MSICondition attribute. That attribute allows you to control the installation of an Office product based on whether a particular MSI-based product is already installed on the device. For example, only install Project Online Desktop Client if Project Professional is already installed on the device. For more information, see MSICondition attribute.
- Some previous versions of Office, Visio, and Project must be uninstalled before installing Microsoft 365 Apps. For example, Office Professional Plus 2016. If they aren’t uninstalled beforehand, the installation of Microsoft 365 Apps will fail. For more information, see Supported scenarios for installing different versions of Office, Visio, and Project on the same computer.
- A reboot is required to finish uninstalling the Windows Installer (MSI) versions of Office, but the reboot isn’t enforced. You can reboot after the Microsoft 365 Apps installation is finished.
- Removing a product might fail if the product is open on the user's device and the Level attribute for the Display element in your configuration.xml file is set to None. If you set the Level attribute to Full, the user will be prompted to close the program so the removal can continue. You can use the FORCEAPPSHUTDOWN property, but that could result in data loss.
- If you're using RemoveMSI on a Windows 7 SP1 computer, pinned shortcuts that the user created might sometimes remain even though the previous version of Office and all of its other shortcuts have been removed. To remove the pinned shortcut, simply click on it and you'll be prompted to remove it. Or, sign in as the user who created the pinned shortcut, and then run the Office Deployment Tool to upgrade to Microsoft 365 Apps.