title: What to use as session id in application insights
body: <p>I am considering adding some support in our app-backend to enable users and sessions to enable the analytics features in application insights.</p>
  
  <p>As far as my understanding goes, i need to <a href="https://docs.microsoft.com/en-us/azure/azure-monitor/app/usage-send-user-context" rel="nofollow noreferrer">annotate the telemetry I send with user id and a session id. </a></p>
  
  <p>For user id we have an id that is static for a user over time.</p>
  
  <p>For the session id i am a bit puzzled on what to do. </p>
  
  <ol>
  <li>Will I, in the Azure portal, benefit from just inserting the user Id in the telemetry, without a sessionId</li>
  <li>What can i use as a sessionkey that is meaningfull? The backend is used by some apps that can not easily be modified</li>
  </ol>