Microsoft365.com/setup is an official portal to activate and start your Microsoft 365 product including office apps, cloud services and other collaboration services. You’ll need to Sign In and enter the Microsoft 365 product key.
Microsoft Office Subscription Upgrade via microsoft365.com/setup
Need to renew your Microsoft Office subscription? Here’s the way to go:
Visit the URL microsoft365.com/setup or office.com/setup.
Click on the sign-up option.
Enter your email ID and password into the respective fields
Then, follow the screen prompt to complete the process with a few clicks.
This may help, J Wick