I'm trying to run an update on SQL Server Reporting Services SharePoint Integrated mode from an 2008 R2 to 2012. The Upgrade Advisor dosen't show any issues and the upgrade procedure goes fine until the step where I have to provide a password for the SSRS Application Pool Account. I do this, and I am 100% sure the password is entered correct. But I get this error:
[Details]
Microsoft.SqlServer.Configuration.Sco.InvalidPrincipalNameException: The credentials you provided for the '' service is invalid.
It seems that it don't know which service it is working with??