Open the Outlook main menu and select Activate Office.Please make sure you understand all these instructions before clicking Remove again. When you click the Remove button, a caution will appear with a list of instructions that you need to follow completely in order to successfully install the Office 365 version.Select the Microsoft Office - Remove Volume License installer.If you're a DDS customer, open the Mac Self Service software catalog.Non-DDS supported customers need to check and upgrade their Outlook software. To fix, DDS customers can run an uninstall script to remove the volume license and activate an Office 365 instance. Resolution: This issue is due to your computer either running old software or a volume license version of Office 2019 for Mac, rather than the Office 365 version.
