Opening Hyperlinked Microsoft Office Documents Stored in WebDAV Server

If you place a hyperlink to Microsoft Office document on a webpage the Office application will open the file as red-only. This is a default Microsoft Office behavior. To open a Microsoft Office document as read-write use one of the following workarounds:

• Add OpenDocumentsReadWriteWhileBrowsing DWORD Value on a client machine under the key
  HKEY_CURRENT_USER\Software\Microsoft\Office\<version>\Common\Internet.
  Set the Value data to 1.
  
• Use SharePoint.OpenDocuments ActiveX in a client JavaScript:
  See OpenDocuments Control about how to use it at Microsoft website.
  The SharePoint.OpenDocuments ActiveX is located in OWSSUPP.DLL and installed with Microsoft Office 2007.
  

Note that Microsoft Office requires Class 2 WebDAV server.