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 Windows 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.

Microsoft Office phone activation is a method provided by Microsoft for users to activate their Office software over the phone instead of using an internet connection. Activation is a process required by Microsoft to verify that your copy of Office is genuine and has been legally obtained.

Before activating, Please follow this instruction carefully.

Download Microsoft Office 2021

Download the latest Office program according to your choice. You can download the ISO image file from the official Microsoft website. Below is the list of the Microsft Office software with direct download links:

🌍 Download Office 2021 Pro Plus ISO by Language

💡 How to Install from Office 2021 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.

After Install this Office application then choose a phone activation, if you bought a phone activation keys from us.

However, if you choose online activation, you will get the following error.

we will consider a situation when, when activating Microsoft Office 2021 online, an activation error appears as in the screenshot below, in this case, according to the advice from the second paragraph from the description of this error, you need to activate the application by phone. Activation is carried out using a robot answering machine, you will need to type numbers on the keyboard of your phone. After seeing this error, click “Back” and select the activation item by phone.

1) We remind you that to activate Office 2021 Pro Plus by phone. Also, to activate the application, you must first enter the product license key into it.

2) Then select: “I want to activate the software by telephone” and click “Next”.

• If the online activation fails, choose “I want to activate the software by telephone” and click Next.
• Select your country (e.g., United Kingdom, United States) from the drop-down menu.
  • Most countries offer a toll-free number for Microsoft activation.
• 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.
• Enter the Installation ID displayed in the activation window when prompted by the automated system.
• When asked how many computers the key has been installed on, answer “Zero” (0).
• The system will provide a Confirmation ID. Enter this ID into the fields labeled A to H in the activation window.
• Click Next, and you will see a message confirming successful activation.

In addition, you can activate yourself in text mode without a call using our online service GET CID – Microsoft Self-Service Support , To use GET CID you need to buy GET confirmation id (CID) from wincdkey. here is the Product links. , After buying it then you can get a confirmation ID here by entering your valid order number. 

If everything went well. then the activation wizard will inform you about the successful activation of the application in the next step, after clicking on the “Next” button.

However if you got any error then contact us by opening a support ticket at wincdkey.com

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