Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Can’t Activate Office 2011Your Office 2011 product key can not be re-used in any of the following scenarios:
- Erased your startup volume and reinstalled using the 2011 installer
Replaced your hard drive or SSD drive
Attempt to install on a different Mac
In these situations, you will have to buy a new product key.
You can activate Office 2011 in these situations only with a brand new never been used before product key (25 characters). Only if you were one of the rare people who purchased Office 2011 using an Office 365 subscription can you migrate forward.