Get SQL Server 2012 SSRS Report Rendering Extensions Using PowerShell
There are new rendering extensions supported in SSRS 2012. Welcome extensions are the OPENXML rendering formats, to be used with Word 2007/2010 (.docx) and Excel 2007/2010 (.xlsx).
To list the rendering extensions, you can use the ReportViewer from the Reporting Services Redistributable Package.
You can download from here
http://www.microsoft.com/en-us/download/details.aspx?id=6442
[System.Reflection.Assembly]::Load("Microsoft.ReportViewer.WinForms, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91") | Out-Null
$ReportServer = "http://KERRIGAN:80/ReportServer"
$rv = New-Object Microsoft.Reporting.WinForms.ReportViewer
$rv.ProcessingMode = "Remote"
$rv.ServerReport.ReportServerUrl = $ReportServer
$rv.ServerReport.ListRenderingExtensions()
This should list all the currently supported extensions.