For new deployments in 2026, Office LTSC 2021 or Microsoft 365 Apps for enterprise is recommended due to Office 2019’s impending end of support.
: If the Activation Wizard appears, choose "I want to activate the software by telephone" . office 2019 standard offline installer
The biggest downside is that Microsoft doesn’t make the offline installer easy to find. It’s not just a single "Download" button anymore. For new deployments in 2026, Office LTSC 2021
If you are in a secure government facility, a manufacturing plant floor, or a basement lab with no internet, the offline installer is your only option. You can transfer the ISO via USB drive and install completely disconnected. For new deployments in 2026
Once the download is complete, open the disk image file ( .img ) and run .