Downloading Docx from IE - Setting MIME Types in IIS

Downloading Docx from IE - Setting MIME Types in IIS

I am sure there is a simple answer to this one.

I have a docx file that I get an error when trying to download(document cannot be found).... .doc is fine .txt is also fine. I am sure this is just an iis setting, the permissions on the server are all the same for all files.

IIS -> Isapi_Redirect -> Tomcat


How do I programmatically create a FTP site in IIS7 on Windows7?
Yes, it's just an IIS setting: by default, it will only serve files for which the extension matches a defined MIME type..
Mysteriously appearing required NT authentication after Classic ASP site update?
To allow .docx files to be downloaded, follow the steps from the KB article linked above:.
Differences between IIS 6.0 / Windows 2003 and IIS 7.0 / Windows 2008
  1. Open the IIS Microsoft Management Console (MMC), right-click the local computer name, and then click Properties.
  2. Click MIME Types.
  3. Click New.
  4. In the Extension box, type the file name extension that you want (in this case, .docx).
  5. 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).
  6. Apply the new settings.

    How do I configure IIS to parse c# code in a .xml file?
    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.

    Passive FTP instead of Active FTP
    In this example, IIS now serves files with the .docx extension.
Note that the KB article uses the generic application/octet-stream MIME type: although that generally should work, if a more specific MIME type exists, such as application/msword, it's always best to use that..
Mod_rewrite for IIS

IIS SMTP Message Inspection


In step 5 of the solution above you said.
In the MIME Type box, type application/msword.

The "application/msword" MIME type is the type for the word 2003 ".doc" files.

The correct MIME type for word 2007 ".docx" files is: .
See this post..


Thanks this is very useful.. If you are interested MIME type for .pptx (Powerpoint 2007) is .
application/vnd.openxmlformats-officedocument.presentationml.presentation .
and .xlsx (Excel 2007) is.
[These where transposed.

I have corrected now, thanks for pointing it out Sven.].


When there is no mime type associated with an extension in IIS (6.0 and up), it will give you 404.

See Requests for static files return 404 error (IIS 6.0). Other than that, and just because you did not specify where the error shows up: When you forbid caching in a header, similar behavior may occur on the client.

But that is a general issue, and not bound to .docx..

95 out of 100 based on 45 user ratings 1145 reviews