title: Azure Pipelines GitHub building branches
body: <p>We are trying out Azure Pipelines CI with a GitHub project now that it is available in the marketplace. I've noticed that it doesn't seem to build branches besides master. Their documentation states that if a <code>trigger</code> section is specified in <code>azure-pipelines.yml</code> that you can configure it to <em>only</em> build specific branches, but that if <code>trigger</code> is not specified that it should be triggering off of all branches.</p>
  
  <p>When I make changes to other branches besides master they do not trigger a build. Anybody know why, or is this a bug?</p>