Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I just purchased Office Home and Student 2019 and have a download with product key for a 2nd computer which was just purchased. However, when asked to login to my Microsoft account, it says 'this login doesn't exist'. I was just using it and signed out to download these aps. and Yes, I have checked my spelling. I just can't login from office setup.