--- title: Silverlight Support slug: ps/help/en_us/ics/com/wrcg/silverlight-support docTags: createdAt: 2026-08-03T10:00:46.626Z --- The system supports Silverlight for rewriting for: - **Sharepoint 2010** - only the default Silverlight pages on Sharepoint 2010 - **OWA 2010** - including file attachments in e-mails The system does not support custom XAP packages (custom Silverlight applications that a user can upload to a Sharepoint site). No configuration steps are required for Silverlight support. To support Silverlight on Sharepoint 2010, a system-generated rewriting resource policy is added for ActiveX with the following details: :::Paragraph{indent="1"} Classid= DFEAF541-F3E1-4C24-ACAC-99C30715084A ::: :::Paragraph{indent="1"} Parameter= initParams\:mediaSource,previewImageSource ::: :::Paragraph{indent="1"} Action= Rewrite URL and response (Static HTML only) ::: :::Paragraph{indent="1"} This policy is loaded during both upgrades and new installations. Do not remove this resource policy. ::: :::Paragraph{indent="1"} The colon (:) in the above Parameter field means the object tag contains the initParams parameter followed by comma separated name-value pairs. ::: :::Paragraph{indent="1"} For example, the above policy works for the following tag: ::: :::Paragraph{indent="1"} `` :::