title: IIS iis_iusrs disappeared on Windows Server 2012R2
body: <p>I have a .Net service installed on a Windows Server 2012R2.</p>
  
  <p>Today, the users have complain because they couldn not store more files on server, it should be permissions related. Right click on the folder -> secutiry and IIS_IUSRS does not exist anymore.</p>
  
  <p>How can be this group deleted?, is it possible to restore it?</p>
  
  <p>I have restored IIS service and machine with no luck. </p>
  
  <p>thanks</p>