Question: When trying to add an External Content app to a SharePoint site, a user receives this message: "External Content Types are not available. Contact your system administrator." What is the most likely issue?

1. The site does not allow for external content.
2. The user's permissions are not correct.
3. The SharePoint External System Events feature is not enabled.
4. SharePoint Business Connectivity Services need to be configured.

Answer: The correct answer of the above question is Option D:SharePoint Business Connectivity Services need to be configured.