Set up an add-in catalog on SharePoint
An add-in catalog is a document library on SharePoint where manifest files for task pane and content Office Add-ins, as well as SharePoint Add-ins, can be published. For Office Add-ins, an administrator uploads a manifest file to the add-in catalog. When an administrator registers an add-in catalog as a trusted catalog (by setting group policy, or from the Trusted Add-ins Catalog page of the Options dialog box, choosing File > Options > Trust Center > Trust Center Settings > Trusted Add-in Catalogs), users can insert the add-in from the insertion UI in an Office client application.
Only one add-in catalog for Office Add-ins can exist per SharePoint web application. To set up the add-in catalog for a web application:
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Browse to the Central Administration Site ( Start > All Programs > Microsoft SharePoint 2013 Products > SharePoint 2013 Central Administration).
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In the left task pane, choose Add-ins.
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On the Add-ins page, under Add-in Management, choose Manage Add-in Catalog.
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On the Manage Add-in Catalog page, make sure you have the right web application selected in the Web Application Selector.
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Choose View site settings.
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On the Site Settings page, choose Site collection administrators to specify the site collection administrators, and then choose OK.
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To grant site permissions to users, choose Site Permissions, and then choose Grant Permissions.
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In the Share 'App Catalog Site' dialog box, specify one or more site users, set the appropriate permissions for them, optionally set other options, and then choose Share.
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To add add-ins to the Office Add-ins add-in catalog, choose Office Add-ins.