Office 2021 Professional Plus (Bind To Microsoft Account) Guide

Office 2021 Professional Plus (Bind to Account) Download, Installation & Activation Guide (Windows)


Office 2021 Professional Plus offers premium productivity apps like Word, Excel, PowerPoint, Outlook, Access, Publisher, and more — ideal for business professionals.
This version binds to your Microsoft account, allowing easy reinstallation on the same or a new machine anytime after uninstalling from the old one.

This step-by-step guide will help you download, install, and activate your Office software.


⚠️ Before You Begin


Only one version of Microsoft Office should be installed on your PC at any time.
If you already have another version (Office 2016, 2019, 365, etc.), uninstall it before proceeding to avoid conflicts.


ℹ️ System Requirements


  • Operating System: Windows 10 or Windows 11

  • Processor: 1.6 GHz or faster, 2-core

  • RAM: 4 GB for 64-bit, 2 GB for 32-bit

  • Storage: 4 GB available disk space

  • Display: 1280 × 768 resolution

  • Internet: Required for activation and updates

  • Browser: Current version of Microsoft Edge, Chrome, or Firefox


ℹ️ Download Office 2021 Professional Plus (Bind to Account)


  1. Visit https://setup.office.com

  2. Sign in with your Microsoft account (or create one if you don't have it)

  3. Enter the 25-character product key you received after purchase

  4. Follow the prompts to link the license to your account

  5. After redeeming your key, click “Install” to download the Office setup file


✅ You can re-download and reinstall Office anytime by signing into your Microsoft account and visiting the Services & Subscriptions section.
Only one active installation is allowed at a time. To install Office on a new PC, you must first uninstall it from the old one.


⚙️ Install Office 2021 Professional Plus


  • Open the downloaded setup file (.exe)

  • Follow the on-screen instructions

  • Wait for the installation to complete (it may take a few minutes)

  • Once installed, open any Office app like Word or Excel


ℹ️ Activate Office 2021 Professional Plus


  • Launch Word, Excel, or any Office app

  • Sign in with the same Microsoft account used during redemption

  • Activation will occur automatically once signed in


ℹ️ Troubleshooting Activation Issues


Wrong Account?
 Make sure you're signed in with the Microsoft account that the license is linked to.

Old Version Still Installed?
 Uninstall previous Office versions completely before installing 2021.

No Activation Prompt?
 Go to File > Account and sign in manually with your Microsoft account.


⚠️ Still need help? Contact our support team with your order number and a screenshot of the error.


ℹ️ Need Help?


Our free 24/7 support team is ready to assist you:


✅ Ready to Get Started?


➤ Buy Office 2021 Professional Plus (Bind to Account) at Buy Key Now and enjoy lifetime access to the latest premium Microsoft Office tools tied securely to your account.