App Catalog is a special site collection that holds all apps. An App Catalog allows tenant admins to make internally developed custom apps available for users to install when they browse apps under the “From Your Organization” filter on the Site Contents page. Putting the catalog into its own site collection makes it easier for tenant administrators to limit permissions to the application. There can be only one app catalog site collection in a web application.
You can create an Sharepoint Online app catalog site collection in few simple steps:
Sign into Office 365 as a global admin or SharePoint admin.
Select the app launcher icon in the upper left and choose Admin to open the Office 365 admin center (if you don’t see the Admin tile, you don’t have Office 365 administrator permissions in your organization).
In the left pane, choose Admin centers > SharePoint.
Click on ‘More Features’ from the left navigation/pane.
Now, click on the ‘Open’ button under Apps.
Select apps in the left pane, and then select App Catalog.
Select Create a new Sharepoint app catalog site, and then select OK.
On the Create App Catalog Site Collection page, enter the required information, and then select OK.
An app catalog site collection has been created.
Once the App Catalog site collection is created successfully, click on the new link to the App Catalog site collection
By default, the following document libraries will be available in the App Catalog site:
Once the App Catalog site collection is created successfully, you can simply add any app to the App Catalog. Adding an app to your app catalog is as easy as uploading any file to a SharePoint Foundation document library.
Note: Before you begin, make sure you have your custom developed app available as an .app file.
in the upper left and choose Admin to open the Office 365 admin center (if you don’t see the Admin tile, you don’t have Office 365 administrator permissions in your organization).
