What are the Microsoft Office MIME Types?

FILExt does not presently have a search capability for MIME types however, in the interest of helping, this FAQ contains a complete list of the official Microsoft Office MIME types for the newest version of Microsoft Office (2007+).
To fully support the new types, web server administrators should add the MIME types for the Open XML formats to their Web server metabase settings so as to add the correct MIME type header in documents saved directly on the server and sent back.
The following table documents the HTTP MIME types that are available when working with Office 2007 documents:

Ext	MIME Type
.doc	application/msword
.dot	application/msword
.docx	application/vnd.openxmlformats-officedocument.wordprocessingml.document
.dotx	application/vnd.openxmlformats-officedocument.wordprocessingml.template
.docm	application/vnd.ms-word.document.macroEnabled.12
.dotm	application/vnd.ms-word.template.macroEnabled.12
.xls	application/vnd.ms-excel
.xlt	application/vnd.ms-excel
.xla	application/vnd.ms-excel
.xlsx	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.xltx	application/vnd.openxmlformats-officedocument.spreadsheetml.template
.xlsm	application/vnd.ms-excel.sheet.macroEnabled.12
.xltm	application/vnd.ms-excel.template.macroEnabled.12
.xlam	application/vnd.ms-excel.addin.macroEnabled.12
.xlsb	application/vnd.ms-excel.sheet.binary.macroEnabled.12
.ppt	application/vnd.ms-powerpoint
.pot	application/vnd.ms-powerpoint
.pps	application/vnd.ms-powerpoint
.ppa	application/vnd.ms-powerpoint
.pptx	application/vnd.openxmlformats-officedocument.presentationml.presentation
.potx	application/vnd.openxmlformats-officedocument.presentationml.template
.ppsx	application/vnd.openxmlformats-officedocument.presentationml.slideshow
.ppam	application/vnd.ms-powerpoint.addin.macroEnabled.12
.pptm	application/vnd.ms-powerpoint.presentation.macroEnabled.12
.potm	application/vnd.ms-powerpoint.template.macroEnabled.12
.ppsm	application/vnd.ms-powerpoint.slideshow.macroEnabled.12

The full description of methods of doing this for Windows servers is described in a Microsoft VSOfficeDeveloper blog entry.