Install a Connected App

You install a connected app in your org by installing a managed package that includes the connected app as a component. For example, ISVs package connected apps to make them available on AppExchange. You can also install an OAuth connected app from the Connected Apps OAuth Usage page. This page lists all OAuth connected apps that users in your org are connecting to currently—including apps that developers created in other Salesforce orgs.

Available in: both Salesforce Classic and Lightning Experience

Connected Apps can be created in: Group, Professional, Enterprise, Performance, Unlimited, and Developer Editions

Connected Apps can be installed in: All Editions

User Permissions Needed
To read, create, update, or delete connected apps:	“Customize Application” AND either “Modify All Data” OR “Manage Connected Apps”
To update all fields except Profiles, Permission Sets, and Service Provider SAML Attributes:	“Customize Application” AND either “Modify All Data” OR “Manage Connected Apps”
To update Profiles, Permission Sets, and Service Provider SAML Attributes:	“Customize Application” AND “Modify All Data”
To install and uninstall connected apps:	“Customize Application” AND either “Modify All Data” OR “Manage Connected Apps”
To install and uninstall packaged connected apps:	“Customize Application” AND either “Modify All Data” OR “Manage Connected Apps” AND “Download AppExchange Packages”

When an Install button appears next to a connected app, users in your org are connecting to the app but it isn’t installed in your org. To manage an app’s security policies, such as which users can access the app and for how long, you must install the connected app in your org.

From Setup, enter OAuth in the Quick Find box, then select Connected Apps OAuth Usage.
Select an app and click Install.
Click Manage App Policies to get details about the app.
Click Edit Policies to control the app’s security policies.

ISVforce Guide

Install a Connected App