Office 2007 MIME Types for IIS
.docm, application/vnd.ms-word.document.macroEnabled.12.docx, application/vnd.openxmlformats-officedocument.wordprocessingml.document.dotm, application/vnd.ms-word.template.macroEnabled.12.dotx, application/vnd.openxmlformats-officedocument.wordprocessingml.template.potm, application/vnd.ms-powerpoint.template.macroEnabled.12.potx, application/vnd.openxmlformats-officedocument.presentationml.template.ppam, application/vnd.ms-powerpoint.addin.macroEnabled.12.ppsm, application/vnd.ms-powerpoint.slideshow.macroEnabled.12.ppsx, application/vnd.openxmlformats-officedocument.presentationml.slideshow.pptm, application/vnd.ms-powerpoint.presentation.macroEnabled.12.pptx, application/vnd.openxmlformats-officedocument.presentationml.presentation.xlam, application/vnd.ms-excel.addin.macroEnabled.12.xlsb, application/vnd.ms-excel.sheet.binary.macroEnabled.12.xlsm, application/vnd.ms-excel.sheet.macroEnabled.12.xlsx, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.xltm, application/vnd.ms-excel.template.macroEnabled.12.xltx, application/vnd.openxmlformats-officedocument.spreadsheetml.template