title: Where can I find System.TeamProjectId for a project in Azure Devops
body: <p>I need this Id upfront but I can't seem to find it anywhere online?<br>
  The <a href="https://docs.microsoft.com/en-us/azure/devops/pipelines/build/variables?view=vsts" rel="noreferrer">documentation</a> only refers to it as a system variable.</p>
  
  <p><strong>Context:</strong>
  I have multiple projects and I want to identify a project during CI so it can run a powershell script hosted in another repository.</p>