Microsoft Office 365 Product Keys — All Versions (2026)

Looking for product keys to install or activate Microsoft Office? Below are all the official generic volume license keys (GVLKs) for Office 365, Office 2024, Office 2021, and Office LTSC — organized by version and edition.

Microsoft 365 / Office 365 Product Keys (GVLK for KMS)

These keys are for organizations using KMS activation. Microsoft 365 Apps (formerly Office 365 ProPlus) requires an active Microsoft 365 subscription — the GVLK simply tells the installer which product to configure.

Office LTSC 2024 Product Keys (GVLK)

Office LTSC (Long-Term Servicing Channel) 2024 is the latest perpetual license version — buy once, use forever. These GVLKs are for KMS activation in volume licensing environments.

Office LTSC 2021 Product Keys (GVLK)

Still widely deployed in enterprise environments. These GVLKs work with KMS activation for Office 2021 volume license installations.

Office 2019 Product Keys (GVLK)

Legacy but still in use. These GVLKs are for volume license KMS activation of Office 2019.

How to Activate Office with These Keys

Method 1: During Office Deployment (for IT Admins)

When deploying Office via the Office Deployment Tool, include the GVLK in your configuration XML. The key is automatically installed during setup.

Method 2: Command Line (After Installation)

Open an elevated Command Prompt and navigate to your Office installation directory:

cd "C:\Program Files\Microsoft Office\Office16"
cscript ospp.vbs /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
cscript ospp.vbs /act

Replace the key with the GVLK for your Office version. The first command installs the key, the second triggers activation against your KMS server.

Method 3: Set KMS Server Manually

If Office can't find your KMS server automatically:

cscript ospp.vbs /sethst:your-kms-server.domain.com
cscript ospp.vbs /act

Office Version Comparison — Which Do You Need?

Office Activation Error Codes & Fixes

Where to Buy a Genuine Office License

• Microsoft Store — Direct purchase, full retail price. Includes Microsoft 365 subscription plans starting at $6.99/month.
• Volume Licensing — For businesses with 5+ users, Microsoft offers volume licensing through partners. This is the most cost-effective option for organizations.
• Medha Cloud (Microsoft Solutions Partner) — We provide Microsoft 365 licensing at partner pricing, including deployment, migration, and ongoing support. 500+ organizations trust us with their Microsoft stack. Get a quote.

Frequently Asked Questions

Are these Office product keys legal?

Yes. These are Generic Volume License Keys (GVLKs) publicly documented by Microsoft for KMS activation. Microsoft publishes them in their official documentation. They are intended for enterprise KMS environments, not for piracy.

Will these keys work on my home PC?

No. GVLKs require a KMS server on your local network to activate. For personal use, purchase a Microsoft 365 Personal subscription ($6.99/month) or a one-time Office license from the Microsoft Store.

What's the difference between Office 365 and Office 2024?

Office 365 (now Microsoft 365) is a subscription that includes always-updated apps, cloud storage, and services like Teams and Exchange. Office LTSC 2024 is a one-time purchase that gets security updates only — no feature updates, no cloud services. Most businesses benefit more from Microsoft 365.

Can I use Office without activating it?

Office enters "reduced functionality mode" after the grace period (usually 5 days). You can open and view documents but cannot edit or create new ones. Unlike Windows, Office does not work fully without activation.

How do I check my current Office version and license status?

Open any Office app (Word, Excel, etc.), click File → Account. The product information shows your version, and the "Product Activated" status shows your license state. In Command Prompt: cscript ospp.vbs /dstatus