Upload or download documents from a external system without a URL, from a desktop.

Hi Rebeca - 

You're describing an integrated systems scenario (since you mentioned an external system).

I'd recommend that you examine our documentation on Appian Web API's and determine if you can use REST calls from the external system to satisfy your goals.

https://docs.appian.com/suite/help/19.2/Designing_Web_APIs.html

Hi Rebeca - 

You're describing an integrated systems scenario (since you mentioned an external system).

I'd recommend that you examine our documentation on Appian Web API's and determine if you can use REST calls from the external system to satisfy your goals.

https://docs.appian.com/suite/help/19.2/Designing_Web_APIs.html