How to Resolve Unlicensed Product Activation Errors Step 1: Sign in to the right accountīefore you can access your Microsoft Office products, you need to make sure you are signed in. Once this occurs, you will need to take a few steps to identify the problem and then fix it to reactivate your products. Office 2019 microsoft certified partner product key not opening update officeIf your Office apps are not opening and showing 'Unlicensed Product ' or ' Non-commercial use/ Unlicensed Product' in the title bar, it means your Office products have been disabled.
