Set browser document mode to IE=edge on SSRS reports

I have Microsoft SQL Reporting Services 2014 on Windows Server 2012R2 and I would like to set the meta tag to use IE=edge. Can anyone advice how to do this? Currently all the reports and the reports manager are using IE version 5 as default.

I have goggled and found a few examples of people changing the meta tag ReportViewer.aspx file in C:\Program Files\Microsoft SQL Server\MSRS12.MSSQLSERVER\Reporting Services\ReportServer\Pages. Unfortunately this has not worked for me.
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Vikas GargAssociate Principal EngineerCommented:

You just simply add to ... \ReportManager\Pages\Report.aspx the markup bellow

 <meta http-equiv="X-UA-Compatible" content="IE=edge"></meta>    

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