For those unaware, Microsoft Office Online Server was a self-hosted version of Microsoft’s web-based Office apps: Word, Excel, PowerPoint, and OneNote. It was designed for companies that didn’t want to rely on Microsoft’s cloud offerings and allowed organizations to host these tools in their own data centres (on-premises) while still providing users with a browser-based experience.
It was mainly used by large organizations such as government agencies and regulated industries where cloud or external data hosting wasn’t available or allowed.
