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Box supports external integration through an HTTP-based REST API.\\
__Restriction:__ REST API does not support resume on upload and mdtm(File modification time) changes.\\
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Create new custom app at [https://app.box.com/developers/console].\\
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[attachments|box_create_custom_app.png]\\
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CrushFTP use __JWT Authentication__ method ([https://developer.box.com/guides/authentication/jwt/]), and not OAuth2. Select JWT based authentication.\\
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[attachments|box_jwt_auth.png]\\
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Check the "Make API calls using the as-user header" checkbox at __Configuration -> Advanced Features__\\