Hi @DodgersKD ，
If the browser uses IE compatibility mode to render the page, the control may not work as expected. Intranet sites may require meta tags to reconstruct browser behavior.
Please refer to :Add a report viewer control to a new web project
Use the ReportViewer control in a web application
Hope this helps.
If the answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
What can I do if my transaction log is full?--- Hot issues November
How to convert Profiler trace into a SQL Server table -- Hot issues November