Receiving .docx attachments with Outlook Web Access

[davep]

I have created a Word 2007 document (.docx file) and saved it to disk. I
attach the file to a message with Outlook 2007 and send it to another. When
(s)he receives the message using Outlook Web Access (OWA), the attached file
is listed with the message as a .docx file. However when the receiver
attempts to save the attachment to disk, it is saved as a .zip file. (Yes,
the saved file can be renamed back to a .docx file, then double-clicking on
it will bring it up properly in Word 2007, but many (most) people do not know
that trick!)

Same happens for .xlsx files...

 

[neo [mvp outlook]]

The extensions/MIME types would have to be added to IIS6. When missing, IE
does a sniff on the file and sees that the header of the file is a ZIP and
offers to save it that way.

Here is a link to help if you manage the Exchange/OWA server.
http://www.jameskovacs.com/blog/ConfiguringIIS6ToServeOffice2007FileFormats.aspx