Hi there ! What are the options in netsuite in term of document interface with other applications for order fulfillment ? I heard about SOAP, REST, csv imports, but is it possible to interface with an hosted file ? Does it require specific licensing ? (thank you for your help !)

What do you mean by that? Pull something off a web server? You can do http/https/sftp

Is there a way to have a 2 way synchronization with a file that would be securely hosted somewhere ? If yes, how is it called in netsuite?

But what do you mean by hosted? Hosted how? What sort of endpoint/service? I'm not being obtuse, it could mean a million different things

I don’t really know, could be hosted in the documents part of netsuite ? On a remote server (sftp or any other secure channel). I don’t know what would be considered best practices for netsuite. It’s kind from you to help me, sorry for not being specific enough :s

Sorry, assumed you were technical, as you named SOAP/REST etc. Who do you need to interface with & what sorts of files do you envisage moving around?

Yes, but I would like to present them the options available for integration in netsuite !