Office - 365 Proofing Tools Offline Installer

Proofing Tools include:

These are not a separate standalone product — they are part of Office 365 / Microsoft 365 Apps, but you can install additional languages and proofing tools without reinstalling Office.

setup.exe /download proofing_config.xml

This pulls all required CAB and DAT files into a local folder (e.g., ./Office).

If you support a global workforce, do not install every proofing language on every PC. This bloats the Office installation by hundreds of megabytes and slows down spell-check (as Office scans against all dictionaries). office 365 proofing tools offline installer

Recommended Strategy:

Even with an offline installer, things can go wrong. Here are the top three errors and fixes.

Title: A Practical Guide to Installing Office 365 Proofing Tools Offline Proofing Tools include:

Microsoft Office 365 is a cloud-first service, but enterprise environments and specific user workflows often require offline capabilities. While the core Office suite installs easily, adding proofing tools for additional languages (spell check, grammar check, thesaurus) can be confusing without an internet connection on the target machine.

Unlike the standalone MSI packages available for older Office versions (2013/2016), Office 365 requires a specific deployment method for offline proofing tools. This guide outlines the proper procedure to download and install these tools using the Office Deployment Tool (ODT).

Pro Tip: Always run winver and check your Office build via File > Account > About Excel. The offline installer’s build number must match or be very close to your installed suite.

Once the installation completes: