Running SSRS Service Account as a Domain User
In order to access the variety of reports which CRM provides out of the box, or to access custom built reports from CRM Reporting Extensions (also known as the SRS Connector), you must be installed on a SQL server with SQL Server Reporting Services running. Generally, when setting up SQL Server Reporting Services, the Service Account which runs the service is set to the default of Report Server. When CRM Server and SQL are on two different servers it may produce an error message at the System Checks page when installing CRM Reporting services because of the Service Account. For security reasons, the best option is to have a domain user as the Service Account.