Now, if the control type is “Reserved.ReportViewerWebPart.axd” then this is an issue with SharePoint.
The “Microsoft SQL Server 2005 Reporting Services Add-in for Microsoft SharePoint Technologies” has been updated to work with the new rsclientprint.dll.
If the control type is “Reserved.ReportViewerWebControl.axd” we should check the following:
We have 2 different major versions here: 8.00.50727 and 9.00.XXXX.
If you see version 8.00.50727 this means you are browsing reports from within CRM or using the ReportViewer control in a custom 2005 web application.
If you see version 8.00.50727 and the version is earlier than 8.00.50727.1843 then you should install the below on the ReportServer or on the CRM server:
Microsoft Report Viewer Redistributable 2005 Service Pack 1
If you see version 9.00.XXXX or 9.0.XXXX then you are browsing through Report Manager, Report Server or perhaps a customer web application built with VS 2008.
Then you should install the below on the report server: