We have a problem with rendering SSRS in IE 11 usually when in report design either "can grow" is set to True or "writing mode" is set to Rotate270. Report renders fine when is run on reporting server itself but problems arise when the same report is run on report portal. We found out that enabling compatibility view in IE helps. Also running the report in Firefox helps as well. Looks like the problem is with content meta tag, in Firefox and report server it is , while on report portal in IE only it is . Is it possible that report portal modifies this while putting together html code for SSRS report in IE?