Unable to activate Microsoft Office

The most common error that occurs when you enter the Microsoft Office product key is:

This is not a valid Office product key, Verify that you have the correct key and retype it.

If you get this error or you are unable to unlock or activate Microsoft Office, first please ensure that you are using the correct type of Office key which is meant for your Region too, and then try this: If this doesn’t help, you may have to contact Microsoft Support.