If you’re looking to streamline your installation process, creating a custom Windows 11 with Office 2021 ISO can be a game-changer. This method allows you to set up both the operating system and the Office suite in a single go—saving you valuable time and minimizing post-installation steps.

In this guide, we’ll walk you through each stage to successfully integrate Office 2021 into a Windows 11 ISO, helping IT professionals, system builders, and power users optimize their setup experience.

Why Integrate Windows 11 and Office 2021 Together?

Creating a unified ISO of Windows 11 and Office 2021 offers several key benefits:

  • Faster setup for new devices

  • Reduces repetitive installations

  • Ideal for IT deployments and system refreshes

  • Ensures consistency across multiple installations

It’s especially useful when deploying systems for business, education, or remote teams.

What You’ll Need Before Starting

To get started with building your custom Windows 11 + Office 2021 ISO, make sure you have:

  • Windows 11 ISO file (download from Microsoft)

  • Office 2021 installation files (download using Microsoft’s Office Deployment Tool)

  • A file extractor tool (e.g., 7-Zip or WinRAR)

  • Integration tools like NTLite or DISM

  • Enough storage space and a reliable system to test the final ISO

Step-by-Step Guide: Create a Windows 11 with Office 2021 ISO

Step 1: Download Office 2021 Installer

Get the latest Office 2021 files directly from Microsoft or via the Office Deployment Tool. Avoid third-party sources to prevent malware or licensing issues.

Step 2: Extract Office 2021 Files

Use 7-Zip or WinRAR to extract the downloaded Office 2021 installer into a separate folder on your system.

Step 3: Mount or Extract the Windows 11 ISO

Mount the Windows 11 ISO using tools like Virtual CloneDrive, or extract it using a file archiver. Access the full ISO contents.

Step 4: Insert Office Files into the Windows ISO

  • Navigate to the sources directory in the Windows 11 ISO

  • Create a new folder named Office2021

  • Copy all extracted Office 2021 files into this folder

This structure ensures Office installation files are available during setup.

Step 5: Use DISM or NTLite to Integrate

Utilize NTLite or DISM (Deployment Image Servicing and Management) to embed Office 2021 into the ISO:

  • Open NTLite and load the Windows 11 ISO

  • Add the Office 2021 folder into the post-setup or silent installer section

  • Rebuild the ISO with changes applied

This results in a custom Windows 11 + Office 2021 ISO that installs both OS and Office in one go.

Step 6: Test Your ISO

Before mass deployment:

  • Use a virtual machine (VMware, VirtualBox, Hyper-V) to test

  • Ensure Windows 11 installs properly

  • Verify that Office 2021 is auto-installed or easily accessible post-setup

Step 7: Deploy or Save for Future Use

Once verified, use the ISO to install Windows 11 with Office 2021 on any system:

  • Perfect for multiple deployments

  • Saves installation time and configuration effort

Best Practices for Integration

  • Use official Microsoft software to avoid activation issues

  • Label the custom ISO for clarity (e.g., Win11_Office2021_Custom.iso)

  • Keep backup copies of both original and modified ISO files

  • Regularly update the ISO if new Office patches or Windows builds are released

Simplify Your Setup with Windows 11 + Office 2021 ISO

Combining Windows 11 with Office 2021 in a single ISO offers a smart, efficient way to install both software packages together. Whether you’re setting up one system or managing a fleet of devices, this approach reduces time and improves consistency.

✅ Ready to Build Your Custom ISO?

Get started today and enjoy seamless setup with Windows 11 and Office 2021 pre-integrated.
👉 Explore Our Office 2021 + Windows 11 Combo Licenses