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How to create a site collection app catalog?
To create a SharePoint Online site collection app catalog, we can use this PnP PowerShell script. Run this script as a tenant administrator. Make sure you have “Tenant Admin” rights and site collection Administrator rights on the “Tenant App Catalog” site before proceeding. Otherwise, you’ll face
App catalog in SharePoint Online is a central repository where Apps are installed and accessible to all sites in your Office 365 tenant. Site collection app catalog allows you to configure a Site collection specific App Catalog.
Are there any apps for the App Catalog?
The App Catalog site will have a document library for Apps for Office and a document library for Apps for SharePoint, as well as a list that tracks App Requests from site users.
How to add SharePoint apps to site collections?
Once enabled, site collection administrators can deploy SharePoint Apps/add-ins and SPFx solutions that will be available only in that particular site collection. This means that instances of the App are only available for use on the Site Collections where the Apps are added to their respective Site Collection App Catalogs.
The process of setting is App only permission is really simple. All you need to do is change the AppManifest.xml file. The problem is if you need tenant level permissions for your app, you can’t register the app principal in any of the site collections, like you would do for any other level of permission requirement like Site Collection admin.
How to register app ID with tenant level permissions?
The problem is if you need tenant level permissions for your app, you can’t register the app principal in any of the site collections, like you would do for any other level of permission requirement like Site Collection admin. Register app id for the add-in under normal site collection in the tenant where add-in will be deployed.