This method guarantees that all installation files remain unmodified and authentic, while still providing the convenience of an offline installer.

: Modified installers are a common delivery method for ransomware and spyware.

If you manage 20 computers, downloading 2.5GB per PC wastes 50GB of bandwidth. One ISO installs unlimited machines offline.

The official Office installer will launch and install the suite completely offline using the secure files you just downloaded. Final Thoughts

Now, use a free tool like Folder2ISO or ImgBurn to convert the C:\ODT folder into an ISO file.