The tfs-plugin provides two checkboxes for triggering builds:

• Build when a change is pushed to TFS/Team Services
• Build when a change is pushed to a TFS pull request

I found that these checkboxes were essentially ignored and a build was always triggered from a PR if the Jenkins service hook was configured as expected.  With the “build when a PR is pushed” checkbox unchecked in both the project and the system configuration, I could create and update PRs and they would still trigger builds in Jenkins.

Either these checkboxes are not working as expected, or they need a better description/help text to describe their intended use.