Save this code as config.xml in your C:\ODT folder.
This is the most clear-cut use case. Many high-security environments, such as government agencies, defense contractors, financial institutions, and research labs, have "air-gapped" networks. These systems are physically disconnected from the internet to protect sensitive data. The online installer is useless in such an environment. The offline installer is the only way to bring software like Office onto these secure networks. You would download the installer on a separate, approved, internet-connected machine, scan it for threats, and then physically transfer it (e.g., via a CD-ROM or a dedicated secure USB drive) to the air-gapped system.
At its core, an offline installer is a complete, self-contained package containing all the files required to install a Microsoft Office product. Unlike the standard online installer—which is a small setup file that downloads the necessary components from the internet during installation—an offline installer gives you the entire software suite, such as Word, Excel, and PowerPoint, in one large file. offline installer office
This will download a .img or .iso file. Once finished, you can double-click this file to "mount" it as a virtual drive and run setup.exe . For Business & IT Pros (Office Deployment Tool)
When you download a file from the internet and then try to run it on a different, offline computer, Windows may block it for security reasons. Save this code as config
The easiest method for home users is directly through their Microsoft account. This works for both one-time purchase versions (like Office Home & Student 2021) and Microsoft 365 subscriptions.
To install Office from this local source on any computer, copy the entire C:\ODT folder (including setup.exe , config.xml , and the Office subfolder) to that computer. Then, open Command Prompt as Administrator on that computer, navigate to the folder, and run: These systems are physically disconnected from the internet
Once downloaded, you can move that folder to any PC and run setup.exe /configure to install without an active web connection. Critical Tips for a Smooth Setup
Open the virtual drive folder and double-click Setup.exe to begin the automatic local installation. Installing via ODT (Method 2)