Downloading Docx from IE – Setting MIME Types in IIS
April 12, 2012 – 1:55 pmTo allow .docx files to be downloaded, follow the steps from the KB article linked above: Open the IIS Microsoft Management Console (MMC), right-click the local computer name, and then click Properties. Click MIME Types. Click New. In the Extension box, type the file name extension that you want (in this case, .docx). In the MIME Type box, type application/vnd.openxmlformats-officedocument.wordprocessingml.document (thanks to @web developer for pointing out this MIME type, which supercedes the 'application/msword' from my original answer). Apply the new settings. Note that you must restart the World Wide Web Publishing Service or wait for the worker process to recycle for the changes to take effect. In this example, IIS now serves files with the .docx extension. dicontek dari : http://stackoverflow.com/