Hi All,

I've written a third party integration as a connected app.   This works great with our Developer instance and I can log in with my Salesforce ID and the API calls into my Salesforce data all work great.
But this falls down when trying to make this work with another Salesforce instance outside of our Developer instance.  When trying to sign in to a Salesforce ID on another instance to make this connection, the user gets "OAuth Error 1800 : There was a problem in setting up your remote access.".  I've viewed the few forum posts on this and could not find an applicable solution.

This is a simple API Integration only, NOT an app that gets installed to use from within the Salesforce app.     What permissions or other piece could I be missing?    Please help and thank you.