You need site administrator permissions to perform this step.
Open a site as site administrator.
Add the add-in to the site
1. Click the cog icon to open the menu and choose Add an app and choose SharePoint Connector for Confluence under Apps you can add:
Image 1: Add the SharePoint Connector for Confluence app to a site (click to enlarge)
2. Trust the add-in:
Image 2: Trust the SharePoint Connector for Confluence app (click to enlarge)
The add-in will be installed:
Image 3: App installation notice (click to enlarge)
Check that you can add add-in parts (web parts)
1. Click the cog icon to open the menu and choose Add a page.
2. Add the app part:
Image 4: App installation notice (click to enlarge)
Image 5: App installation notice (click to enlarge)
The add-in part should now be visible. Check that it behaves as expected and documented.