title: ADFS: Error while establishing SSO Connection on windows server 2012
body: <p>When i access my sing-on url(<a href="https://abcd.avcd.ac/adfs/ls/IdpInitiatedSignOn.aspx" rel="nofollow">https://abcd.avcd.ac/adfs/ls/IdpInitiatedSignOn.aspx</a>) from my code to establish connection with adfs, I get error as:  </p>
  
  <pre><code>A WS-Trust endpoint that was configured could not be opened. 
  
  Additional Data 
  Address: https://win-3723jtvfe02.abcd.avcd.ac/adfs/services/trust/2005/windowstransport 
  Mode:    WindowsTransport 
  
  Error: 
  MSIS0006: A Service Principal Name is not registered for the AD FS service account. 
  </code></pre>
  
  <p>And I also get warning as:</p>
  
  <pre><code>The SSL certificate does not contain all UPN suffix values that exist in the enterprise. 
  Users with UPN suffix values not represented in the certificate will not be able to Workplace-Join their devices.
  </code></pre>
  
  <p>Please help me to figure out this issue.</p>