Office Online Server
The Microsoft Office Online Server allows users to view and, depending on the scenario, edit Office documents in SharePoint libraries by using a supported browser on various devices such as PCs, mobile devices, and tablets. Figure 40 shows an Office Online Server instance within the web server tier in each Availability Zone.
It is important to notice that the Office Online Server role is not installed on the SharePoint 2016 servers and must be deployed on separate servers in the environment. The Office Online Server can also be used by other enterprise products like Microsoft Exchange and Skype for Business for rendering Office documents through a browser.
The AWS CloudFormation template provided by this Quick Start allows you to choose whether to include Office Online Server in each Availability Zone in your environment. Figure 41 shows the template parameter that controls that setting. If you choose to include these servers, the Quick Start will prepare the instances for Office Online Server and handle the prerequisites. You’ll need to download, install, and configure Office Online Server manually.
If you've included Office Online Servers in your template launch, you will need to configure them to work with your SharePoint farm. For configuration steps, see Configure Office Online Server for SharePoint 2016 on the Microsoft TechNet site. You'll need to download and install the Office Online Server components from Microsoft.