Are your Microsoft licenses genuine and authentic?

Yes, 100% of our licenses are genuine Microsoft products sourced directly from authorized channels. Every license comes with full Microsoft support and lifetime validity.

How fast is the delivery after purchase?

We provide instant digital delivery. Your license key will be delivered to your email within seconds after payment confirmation. No waiting, no shipping delays.

What payment methods do you accept?

We accept all major credit cards (Visa, Mastercard, American Express), PayPal, and cryptocurrency payments. All transactions are secured with SSL encryption.

Do you offer customer support?

Yes, we provide 24/7 customer support via email and live chat. Our expert team can help with installation, activation, and any technical questions.

Is there a money-back guarantee?

Yes, we offer a 30-day money-back guarantee. If you're not satisfied with your purchase or experience any issues with activation, we'll provide a full refund.

Can I use the license on multiple devices?

It depends on the product. Single-device licenses can be used on one PC. We also offer multi-device packs (5 PC) for families and businesses that need multiple installations.

Can I use my product key on multiple computers?

No, an Office 2021 retail license is valid for one device only. To use Office on multiple computers, you need additional licenses or a Microsoft 365 subscription.

Do I need internet to activate Office 2021?

Online activation is preferred and fastest. If internet isn't available, you can use phone activation as an alternative method.

What if I lose my product key?

If you linked your key to a Microsoft account, you can redownload Office from account.microsoft.com. If not, check your email receipt or contact your retailer.

Can I transfer my Office 2021 license to a new PC?

Yes, retail licenses can be transferred. First uninstall Office from your old PC, then install and activate on your new PC with the same product key.

Is there a time limit to activate Office?

Office 2021 works in reduced functionality mode for about 30 days. After that, it becomes read-only until activated. Activate promptly to avoid limitations.

Can I use a Windows product key on Mac?

No, Office 2021 for Windows and Mac require separate product keys. Make sure you have a key specifically for your operating system.

Why does my Office say 'Unlicensed Product'?

This usually means activation was lost or never completed. Re-enter your product key via File > Account > Change Product Key to reactivate.

How do I know if my product key is genuine?

Genuine keys activate successfully and don't cause repeated deactivation. Purchase only from Microsoft or authorized retailers to ensure authenticity.

Can I activate Office 2021 without a Microsoft account?

Yes, you can activate with just a product key. However, linking to a Microsoft account makes reinstallation easier in the future.

What happens after Office 2021 support ends?

Office 2021 support ends October 2026. After this, it will still work but won't receive security updates. Consider upgrading when support ends.

How to Activate Office 2021 with Product Key

Why Activation Matters

Activating Office 2021 with your product key unlocks all features and removes trial limitations. Without activation, Office enters read-only mode after a grace period. This guide covers all activation methods for both Windows and Mac, including troubleshooting common issues.

Before You Activate

Ensure you're ready for successful activation

Have Your Product Key Ready
Important

Locate your 25-character product key from your purchase confirmation email or product card.

Connect to the Internet
Important

Online activation requires a stable internet connection. Phone activation is available as backup.

Install Office First

Office 2021 must be installed before activation. Download from office.com/setup if needed.

Close All Office Apps

Close Word, Excel, PowerPoint, and other Office apps before starting activation.

Activate Office 2021 on Windows

Step-by-step activation for Windows 10 and 11

Method 1: During First Launch
Recommended

1Open any Office app (Word, Excel, or PowerPoint)
2You'll see an activation prompt or 'Activate' button
3Click 'I have a product key' or 'Enter Key'
4Type your 25-character product key
5Click 'Activate Office' and wait for confirmation

Method 2: Through File Menu

1Open any Office application
2Click 'File' in the top menu
3Select 'Account' from the left sidebar
4Click 'Change Product Key' or 'Activate Product'
5Enter your 25-character key and click 'Activate'

Method 3: Command Prompt (Advanced)

1Open Command Prompt as Administrator
2Navigate to Office folder: cd "C:\Program Files\Microsoft Office\Office16"
3Run: cscript ospp.vbs /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
4Then run: cscript ospp.vbs /act
5Wait for 'Product activation successful' message

Activate Office 2021 on Mac

Activation steps for macOS (Intel and Apple Silicon)

Open Any Office App

Launch Word, Excel, or PowerPoint from the Applications folder or Launchpad.

Sign In or Enter Key

When prompted, click 'I have a product key' instead of signing in with a Microsoft account.

Enter Product Key

Type your 25-character product key carefully. Double-check for typos.

Complete Activation

Click 'Activate Office' and wait for the confirmation message.

On Mac, you can also activate by going to any Office app's menu bar > [App Name] > About > Activate.

Link Key to Microsoft Account

Associate your product key for easier reinstallation

Benefits

Reinstall Office without needing the key again
Track your licenses in one place
Transfer Office to a new computer easily
Access download links anytime

How to Link

1Go to account.microsoft.com/services
2Sign in with your Microsoft account
3Click 'Enter product key' or find Office in subscriptions
4Type your 25-character product key
5The key is now linked to your account permanently

One-Time Linking

Once linked to a Microsoft account, a product key cannot be transferred to a different account. Choose your account carefully.

Phone Activation (Offline Method)

Activate Office when online activation fails

If online activation doesn't work, you can activate Office by phone. This is useful for computers without internet or when experiencing activation server issues.

Start Phone Activation

Open any Office app > File > Account > Activate by Phone. Or, run 'slui 4' in the Run dialog (Win+R).

Select Your Country

Choose your country from the dropdown menu to get the correct phone number.

Call Microsoft

Call the toll-free number displayed and follow the automated system prompts.

Provide Installation ID

Read the Installation ID numbers shown on your screen to the automated system.

Enter Confirmation ID

Type the Confirmation ID provided by the phone system into Office to complete activation.

Microsoft Activation Phone Numbers

Numbers may change. Find current numbers at microsoft.com/activation

Country	Number
United States	1-888-571-2048
United Kingdom	0800-018-8354
Canada	1-888-571-2048
Australia	1-800-642-377
Spain	900-814-856

Verify Activation Status

Confirm Office is properly activated

On Windows

1Open any Office application
2Click 'File' > 'Account'
3Look for 'Product Activated' under Product Information
4You should see 'Subscription Product' or 'Office 2021' with 'Product Activated'

On Mac

1Open any Office application
2Click the app name in the menu bar (e.g., 'Word')
3Select 'About [App Name]'
4Look for 'Product Activated' or 'Licensed to [Your Name]'

Signs of Successful Activation

No activation prompts when opening Office apps
'Product Activated' message in File > Account
All features work without restrictions
No 'Trial' or 'Unlicensed Product' banners

Types of Office 2021 Activation

Type	Description	Transferable	Limit
Retail (Product Key)	One-time purchase for personal use	Yes, can transfer to new PC	1 device per key
Volume License (MAK/KMS)	Business/enterprise activation	Depends on agreement	Multiple devices
OEM (Pre-installed)	Bundled with new computers	No, tied to original PC	1 device only

Troubleshooting Activation Issues

Solutions to common activation problems

Microsoft Support and Recovery Assistant

Download Microsoft's free tool to automatically diagnose and fix activation issues.

Download tool

Frequently Asked Questions

Related Office 2021 Guides

Microsoft Account Activation

View all Office 2021 guides

Need an Office 2021 Product Key?

Get a genuine Office 2021 Professional Plus license with instant email delivery.

Buy Office 2021 Key