1. Close all Office programs, and Open a Command Prompt as Administrator 2. Navigate to the Office Installation folder %ProgramFiles%\Microsoft Office\Office15\ 3. type: fscript ospp.vbs /act 4. Should give result <product activation successful>
If you encounter that you do not have permission to share your own Calendar. When I done this for Neuromod Medical It turned out that the user had shared her own calendar to herself with view only permissions on a local Outlook on their PC and then ...