title: SSRS - "As the user viewing the report" error
body: <p>Trying to get &quot;As the user viewer the report&quot; working as the log in method for a data source in SSRS. When I try testing the connection, I'm getting this error: &quot;Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.&quot;</p>
  <p>Using Kerberos Configuration manager, I can verify that I have the proper SPNs in place and the account I'm running the SSRS Service with has proper delegation. I'm able to connect to the SQL server that is feeding the data source and verify the connection is using Kerberos. I'm also able to connect to a SQL Server instance on the reporting machine from my machine in SSMS and then access the data source's SQL Server through a linked server object with &quot;Be made using the login's current security context&quot; as the security type on the linked server. It appears that double hop is working properly when it is SQL Server instance to SQL Server instance, but not from Reporting Services to SQL Server. I've added  to the RSReportServer.config file. I've tried setting impersonate identity in the web.config file both to true and false. I'm guessing there is a problem with IIS's configuration somewhere, but I can't find what it is and haven't found anything else on the internet.</p>