In our SSRS report manager page we get the below error on the Datasources. This all worked fine previously and seems to suddenly have stopped working. I have no idea what the issue could be.
All SPN are set up and the rsreportserver config file contains correct authentication...
<AuthenticationTypes> <RSWindowsNegotiate/> <RSWindowsKerberos/> <RSWindowsNTLM/> </AuthenticationTypes>
In the SQL Server logs I see this error...
Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'. Reason: Token-based server access validation failed with an infrastructure error.
I followed the checklist listed here for SPN - http://blogs.technet.com/b/taraj/archive/2009/01/29/checklist-for-double-hop-issues-iis-and-sql-server.aspx but still not fixed the issue.
What is causing this issue??