Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Beatriz Sanchez3. Thanks for the reply and I apologize for my late reply. I'm sorry to learn that the solution to remove the keychain didn't work for your issue. To better assist you, I would like to confirm your version of Office. You can open any Office application, such as Word, click on the application's name in the top menu bar and view the version information.In addition, you can try to remove the existing Office license from your device completely by using the License Removal Tool and try to reactivate it to see if it solves your problem.Please refer to the detailed steps: How to remove Office license files on a Mac - Microsoft SupportPlease give us feedback on the results after trying this solution and I will follow up on your issue promptly.
Best Regards Eliac | Microsoft Community Support Specialist