Microsoft Office Deployment Tool (ODT)
The most effective "offline" method for installing Office 2021 proofing tools is using the . While a one-time internet connection is required to download the initial files, this method allows you to bundle specific proofing tools into a single local installer for subsequent offline deployments. Recommended Method: Office Deployment Tool (ODT)
- No Internet? No Problem. Air-gapped networks (government, defense, finance) cannot phone home to Microsoft for dictionary updates.
- Consistency Across a Fleet. You want every user in your German or French office using identical dictionary versions.
- Bandwidth Management. Downloading a 500MB+ language pack across 100 thin clients is wasteful. One offline installer on a USB drive is faster.
The "best" installer depends on whether you are an individual user or a professional managing multiple PCs.
Volume Licensing Service Center
If you have a Volume License agreement (even for just 5 seats), log into the .
Command Prompt
Open as Administrator, navigate to your folder, and run: setup.exe /download download.xml


