Adding an icon to custom Word 365 Backstage tab RRS feed

  • Question

  • We're moving a backstage customisation from Office 2010 to Office 365.

    After a lot of searching this answer has got us to a point where we have the functionality in place.

    However when I try and add an icon to the top-level custom tab, the customisation breaks, and the Word's standard "New" menu returns.

    <customUI xmlns="">
        <tab idMso="TabOfficeStart" visible="false" />
        <tab id="MFLLP" label="MF New" insertAfterMso="TabOfficeStart" imageMso="FileNew">

    The above code works except for the imageMso="FileNew"
    That imageMso works deeper in the tab (I've omitted the contents of the tab for brevity) but not at the top level

    What am I missing in Word 365?

    Dan Kelly

    Friday, October 4, 2019 11:04 AM