Configuring Reporting Services 2008 R2 in SharePoint 2010 Integrated mode is straight forward and simple. If you have read my post Configuring Reporting Services 2008 R2 in SharePoint 2010 Integrated Mode – Part I and Configuring Reporting Services 2008 R2 in SharePoint 2010 Integrated Mode – Part , then you know the way of configuring it. You will not face much issues after configuring if it is done with Standalone SharePoint 2010 architecture. If it is a SharePoint farm which components are distributed, few things should be considered. Here are some of points you need to consider when Reporting Services is configured in SharePoint 2010 Farm. Note that this was tested with a Web Application which Authentication is set as Classic and NTLM is set for Authentication Provider.
Domain accounts created
Reporting Services Account: Domain account, no admin privileges. Usually name it as a Domain\ReportingServices. Set this with Reporting Service Configuration Manager.
Application Pool Account: Domain account, no admin privileges. Usually name as Domain\SP_SSRSApp. Use this when the Web Application is created with SharePoint.
Site Collection (or Site) account: Domain account, need local admin rights. Usually name as Domain\SP_Admin.
** All accounts are maintained as Managed Accounts in SharePoint.
Reporting Services Windows Service Account
This should be a domain account. Once it is set with Reporting Services Configuration Manager, you need add the same account to SharePoint too. First, have it as a Managed Account (Central Administration –> Security –> General Security –> Configure Managed Accounts). Then add the account to the Site where you have configured Reporting Services Libraries. You can add this account to Home Members group. Errors you may get if it is not added are “The permissions granted to user ‘Domain\User’ (what ever account you used for logged in) are insufficient for performing this operation.” and “rsAccessDenied”. Note that error has no link with the service account but it is related to it. You may get this error with Report Builder or BIDS when deploying reports, or viewing reports.
In addition to that, you need to make sure that the account is added to Web Application content database which is created for Web Application. If not, you may get and error “Report Server has encountered a SharePoint error”.
Other than that, this account is in ReportServer database too. It is automatically added, but make sure that it is there.
Allow Anonymous Setting
Make sure that Allow Anonymous is set as false when the Web Application is created. I faced an issue related deployment from BIDS if this is not set to false (read my post on it). Once the application is created, double-check with IIS (Site –> Authentication) and see whether it is disabled. As per the Authentication and Authentication Provider we set, Only ASP.NET Authentication and Windows Authentication should be enabled.