Need to change the product key on your Microsoft Office installation? Whether you’re on Office 2016, 2019 or 2021 Pro Plus, you can swap in a new key from inside any Office app in just a few clicks. This guide shows you how — and how to finish activation with your Confirmation ID.
How to Change Your Office Product Key
- Open any Office app (Word, Excel, etc.), select the File menu, then Account near the bottom.
- Under Product Information, click Change License.
- Enter your new product key. Office will show a new Installation ID — submit it on our Get Confirmation ID page to receive your Confirmation ID.
- Enter the Confirmation ID back into Office — your activation is now complete.
Tip: if the Confirmation ID doesn’t appear within 30 seconds, refresh the page and submit again. Still stuck? Open a support ticket and we’ll help.
Why Change Your Office Key?
You might need a new key if your current one has stopped working, you reinstalled Office, or you just bought a fresh license from us. Changing the key doesn’t remove Office or your files — it simply re-licenses your existing installation.
Where to Buy a Genuine Office Pro Plus Key
All genuine and delivered instantly on your order confirmation page.
Frequently Asked Questions
Will I lose my files or settings?
No. Changing the product key only re-licenses Office — your documents and settings stay exactly as they are.
What is a Confirmation ID?
It’s the code that completes phone activation. After you change the key, Office shows an Installation ID, and our tool turns it into a Confirmation ID.
What if I can’t get a Confirmation ID?
Refresh the page and try again. If it still won’t generate, open a support ticket and we’ll sort it out under your 7-day warranty.