Had some troubles with Office 2007 files not being downloadable on our windows servers … did a bit of Googling and found this nice list of Office 2007 mime-types: .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 Adding all mime-types to IIS in one step is …