Salesforce Authentication Failing

Question

I am trying to use OAuth authentication to get the Salesforce Authentication Token, so I referred wiki docs, but after getting authorization code, when I make a Post request

Answer 1

We had this issue as well.

Check your Connected App settings - under Selected OAuth Scopes, you may need to adjust the selected permissions. Our app primarily uses Chatter, so we had to add both:

• Access and manage your Chatter feed (chatter_api)
• Perform requests on your behalf at any time (refresh_token).

Again, your mileage may vary but try different combinations of permissions based on what your Application does/needs.

Additionally, the actual invalid_grant error seems to occur due to IP restrictions. Ensure that the server's IP address that is running the OAuth authentication code is allowed. I found that if the SFDC environment has IP restriction setting Enforce IP restrictions set (Setup -> Administer -> Manage Apps -> Connected Apps), then each User Profile must have the allowed IP addresses as well.