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✅ How to Activate Microsoft Office 2021 Professional Plus by Phone (Step-by-Step Guide)
If you’ve installed Microsoft Office 2021 Professional Plus and need to activate it without internet, the Phone Activation method is a reliable, fast, and Microsoft-approved solution.
In this guide, you’ll learn how to activate Office 2021 via phone step by step, even if you’re not tech-savvy.
🔍 Why Choose Phone Activation?
Phone activation is useful if:
- Your PC is offline or has limited internet access
- Online activation fails or shows error codes
- You’re using a retail or volume license key
- You’re reinstalling Office on a new system
📋 What You Need
Before you begin, make sure you have:
- Office 2021 already installed
- A valid 25-character product key
- A working phone (mobile or landline)
- 5 to 10 minutes of time
🛠️ Step-by-Step Guide to Activate Office 2021 via Phone
✅ Step 1: Open Microsoft Office
Launch any Office application like Word or Excel.
If it’s not activated, it will show a screen asking for activation.
✅ Step 2: Enter the Product Key
You’ll be asked to enter your 25-character license key.
Type it in and click Next.
✅ Step 3: Select “I want to activate the software by telephone”
If online activation fails or your key requires offline activation, choose:
“I want to activate the software by telephone”
This option opens the Phone Activation Wizard.
✅ Step 4: Choose Your Country or Region
Select your country from the list (e.g., India, USA, UK).
You will now see a toll-free Microsoft Activation Center number to call.
✅ Step 5: Call the Microsoft Activation Center
Use your phone to dial the number.
You’ll hear an automated voice system (IVR) that will guide you.
Be prepared to:
- Choose the option for activating Microsoft Office
- Enter how many computers you’re installing it on (enter 1)
- Read out or enter the Installation ID from your screen
✅ Step 6: Enter the Installation ID
On your PC screen, you’ll see a long Installation ID split into 9 parts.
Give this ID to the automated system when prompted.
✅ Step 7: Receive the Confirmation ID
After verifying your Installation ID, you’ll receive a Confirmation ID (also in 7 or 8 parts).
Enter this Confirmation ID into the boxes shown in your activation window.
✅ Step 8: Complete Activation
Click Next once you’ve entered the Confirmation ID.
If successful, you’ll see:
✅ “Your copy of Microsoft Office is activated successfully”
That’s it! Office 2021 is now fully activated.
🔁 How to Check Activation Status
- Open any Office app (e.g., Word)
- Click File > Account
- Under Product Information, you should see:
“Product Activated – Microsoft Office 2021 Professional Plus”
🛡️ Tips to Avoid Activation Errors
- Double-check the product key for typos
- Use only one PC per license (unless you bought a multi-PC license)
- Save the Confirmation ID in case you reinstall Office later
📌 Common Activation Errors and Fixes
| Error Code | Meaning | Fix |
|---|---|---|
| 0xC004C060 | Key has been blocked | Contact Microsoft |
| 0xC004F074 | KMS server not found | Use phone activation |
| 0x8007007B | Invalid file name or path | Use valid installation method |
📣 Final Words
Phone activation for Microsoft Office 2021 is simple and safe.
If you’re facing online issues or using Office on a system without internet, this method will activate your product successfully and legally.
Activate Microsoft Office 2021 Professional Plus by phone
Step-by-step Office 2021 activation guide
Offline activation for Office 2021
Microsoft Office phone activation method
How to enter Confirmation ID in Office 2021