Thursday 23 August 2012

IIS 6 not serving .docx files

I had a problem a while back where an IIS 6 server was not serving .docx extension files even though they were definitely there on the server. I immediately thought that the .docx MIME type must not be included in IIS 6 by default and it turns out that was the cause of the problem. Here is how you fix it:
  1. Open IIS 6
  2. Right click computer and select properties
  3. Select MIME types
  4. Select New
  5. Type in the extension '.docx' and the MIME type 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
  6. Select OK and exit the properties screen
  7. Refresh your site's application pool
This will happen with all of the Office 2007-specific file extensions so here is a list of their MIME types:
  • .docx - application/vnd.openxmlformats-officedocument.wordprocessingml.document
  • .dotx - application/vnd.openxmlformats-officedocument.wordprocessingml.template
  • .pptx - application/vnd.openxmlformats-officedocument.presentationml.presentation
  • .potx - application/vnd.openxmlformats-officedocument.presentationml.template
  • .ppsx - application/vnd.openxmlformats-officedocument.presentationml.slideshow
  • .xlsx -application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
  • .xltx - application/vnd.openxmlformats-officedocument.spreadsheetml.template
  • .sldx - application/vnd.openxmlformats-officedocument.presentationml.slide
  • .xlam - application/
  • .xlsb - application/