Hello @alsherren, thanks for posting to the FME Community! Can you try setting the Callback URL (in Salesforce) and the Redirect URI (in FME Form) to : https://localhost 

Please update me on whether this resolves the error. Happy to help, Kailin.

Hi @kailinatsafe thanks for the suggestion;  I have tried but now get a different error:

Hello @alsherren, can you confirm the callback URL is set to localhost in salesforce as well? I think the main idea is to have callback URL in salesforce and the redirect URI in fme set to the same value. If you’re still having issues, perhaps consider submitting a support case! Best, Kailin.

HI @kailinatsafe Where should this be done?  I can confirm the callback URL has been set in the app manager settings:

Hello @alsherren, awesome - that looks correct on the salesforce side. Within FME Form, we can set https://localhost as the Redirect URI in the following location: 

Let me know if this works or if we are still unable to connect. Best, Kailin.

Hi @kailinatsafe I can confirm URI has been set to the same in the Salesforce (Read Only) web service, and still produces same error as previously.

Hello @alsherren, hmm… apologies! I think we need to take a closer look at what is going on. Are you able to submit a support case please? Best, Kailin

@kailinatsafe  thank you, I have done that now (https://support.safe.com/hc/en-us/requests/48237)

@kailinatsafe are you able to give any sort of ballpark timescale for someone to start actioning?  I’ve set ticket to ‘medium’ urgency but don’t know what that means..