There is a requirement to show error page whenever there was an error either while selecting filters or report processing, user would be accessing the reports directly from reportmanager url.
As we know, SSRS is also a asp.net web site with web.config file and customError tag is used to redirect user to a custom error on any error. Following is snippet of code taken out from web.config of
web.config of asp.net project.
<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
<error statusCode="403" redirect="NoAccess.htm" />
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