title: Global Variable that can be used with all team project in TFS collection
body: <p>I am looking for a way to store a global variable (password) that can be used with all Team Projects in our TFS collection.  This will be used in our build/release process.  Currently we are on TFS 2017.3 but plan on upgrading to Azure DevOps 2019 soon.  </p>
  
  <p>I've tried using the Library and variable groups in TFS, but these must be entered for each team project which we have over 200 of.</p>