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Microsoft Office XML MIME Types

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We’ve had a couple of customers ask about this recently, where documents created in newer versions of MS Office don’t download to the browser correctly. Instead of downloading as an MS Office document they download as a ZIP file.

The reason behind this is because they are new file types and are basically XML files inside a ZIP archive and servers setup before these new files came on the scene don’t know what the correct type of file is, so they check the file and it looks like a ZIP archive, so that’s what they tell your browser.

All of our cPanel based business class hosting fully supports the new MS Office MIME Types – so your files will download as MS Office documents and not as ZIP archive files.

If you’d like to modify your own server so that it supports the new MS Office file extensions and file types then you need to place the following entries in to you /etc/mime.types file (for plain CentOS/RedHat) or /usr/local/apache/conf/mime.types if you’re running cPanel.

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

Once done, restart Apache and you should be good to go with MS Office Files downloading correctly.

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