Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi, first open Excel >> File >> Account and make sure you’re signed in with the account linked to your Office license.
If you purchased Office yourself, check that your Office product or active Microsoft 365 subscription appears here: https://account.microsoft.com/services
If it still fails, please share a screenshot of the exact licensing error and the Office product name under File >> Account. Hide your email address and any product key.
Let me know what you find, and I’ll help with the next step.