But, of course, you need a subscription plan. But, once you have downloaded, you can use them on any computer. Luckily, there is a legal way to download the Office 365 image file. Well, without taking more time, let’s come to the download process. Once you have downloaded the offline ISO or installer, you can install it as many times you want, but at most in 5 PCs. The offline is very handy, if you have purchased the Personal plan. Download Office 2019 Offline Installer ISO.