Microsoft Office 2021 Professional Plus is the latest standalone version of the popular productivity suite, offering enhanced features, performance improvements, and seamless compatibility with Windows 10 and 11. Whether you’re a student, professional, or business user, Office 2021 Pro Plus provides essential tools like Word, Excel, PowerPoint, Outlook, and more to boost your productivity.

This updated guide walks you through the entire process—from downloading the official installation files to installing and activating your Office suite. Whether you’re using a product key, phone activation  this step-by-step guide ensures a smooth setup experience.

Step 1: Download Microsoft Office 2021 Pro Plus

You can download the official Office 2021 installation files directly from Microsoft.

🌍 Download Office 2021 Pro Plus ISO by Language

💡 How to Install from ISO:

1. Mount ISO: Right-click the downloaded .img file and select Mount.
2. Run Setup: Open the mounted drive and run setup.exe.
3. Complete Installation: Follow the prompts to finish installation.

🔑 Step 3: Activate Office 2021 via Phone Activation

1. Open any Office app (Word, Excel) after installation.
2. When prompted to enter a product key, use the key you purchased.
3. If the online activation fails, choose “I want to activate the software by telephone” and click Next.
4. Select your country (e.g., United Kingdom, United States) from the drop-down menu.
   • Most countries offer a toll-free number for Microsoft activation.
5. Call the provided Microsoft number and follow these steps:
   • Press 1 to agree to the call recording.
   • Press 3 for Office activation.
   • Press 1 to proceed.
6. Enter the Installation ID displayed in the activation window when prompted by the automated system.
7. When asked how many computers the key has been installed on, answer “Zero” (0).
8. The system will provide a Confirmation ID. Enter this ID into the fields labeled A to H in the activation window.
9. Click Next, and you will see a message confirming successful activation.

🌐 Step 4: Activate Online Without a Call (Optional)

If you prefer to activate without calling, use the Microsoft Self-Service Support for phone activation:
👉 Buy Get Confirmation ID (CID) 

1. Enter your Installation ID and order number here after buying it.
2. Generate the Confirmation ID and enter it in the activation window.
3. Click Next, and your Office will be successfully activated.

Whats the benefit of Office 2021 pro plus phone activation with Confirmation ID:

After purcheing this office 2021 pro plus phone activation with confirmation id  .You will get an activation key with a confirmation ID.

Example:

office 2021 pro plus product key: ABCDE-EFGHO-BFMQT-YGG63-ABCD

CID Number: 123456-78910-111213-141516-171819-202122-232425-25256

Its a hassle-free activation and easy to activate process.You don’t need to call Microsoft’s hotline number to activate office.