Tip# 106: How to install application programmatically from the catalog

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By default, you can install application from the App Catalog programmatically only at SharePoint Development sites, and not on other sites. This behavior is managed by the "Application Sideload" feature that is enabled on development sites.

If you want to install apps programmatically on regular sites you just need to enable the "Application Sideload" feature manually (for example using powershell). The feature id is "AE3A1339-61F5-4f8f-81A7-ABD2DA956A7D"

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