Hi,

you already posted the answer in your link.

There are some options:

1. Globaly disable Rendering Extensions (e.g. Excel Export)

In C:\Program Files\Microsoft SQL Server\MSRS12.MSSQLSERVER\Reporting Services\ReportServer\rsreportserver.config set "Visible"-Attribute of a extension to false. Normally you don't have to restart the Report Server. It recognizes the changes in the config file and reloads the Settings.

2. Remove the entry in the PreRender-Event of your ReportViewer

3. Add some Javascript to your ReportViewer.aspx

http://social.msdn.microsoft.com/Forums/sqlserver/en-US/0c680c69-9f7d-42aa-a6b4-b1178eab8adf/limit-report-from-being-exported-to-excel?forum=sqlreportingservices