How do I configure an External App for a course using XML?
One way to configure an app for a course is by using XML.
View App Configurations
To configure an app, click the View App Configurations button.
Add New App
Click the Add New App button.
Add App Details
Enter the name of the App in the name field . Enter the consumer key in the consumer key field  and the shared secret in the shared secret field . This key and shared secret will be provided by the vendor or (if using the Edu Apps Index) provided by the website.
Note: There are some Apps that do not require a consumer key or shared secret, so pay attention to the configuration directions.
Set Configuration Type
Enter Configuration XML
View the linked App.