title: Error when trying to create new Login user for SQL 2012
body: <p>I'm trying to follow the procedures described in this <a href="https://stackoverflow.com/questions/1933134/add-iis-7-apppool-identities-as-sql-server-logons">link here</a> but if I enter 
   IIS APPPOOL\AppPoolName as the login name (as in step 3) it throws an error saying that it is not a valid name because it contains invalid characters. I'm using SSMS for SQL 2012. </p>
  
  <p>UPDATE: Just to clarify: The "Invalid character" error was b/c I was trying to enter the user    on "SQL Server Authentication" when it must be "Windows Authentication".</p>