1. 
2. Click the 'Configure' link next to the application link that you want to configure trusted apps authentication for.
3. Click the 'Outgoing Authentication' tab. The outgoing authentication page will be displayed.
4. Click the 'Basic Access' tab.
5. Click the 'Configure' button and enter the credentials that the remote application will use to log into your application, i.e. 'Username' and 'Password'.
6. Click the 'Apply' button to save your changes.