2.1.772 Part 1 Section 19.562, svg:underline-position
a. The standard defines the attribute svg:underline-position, contained within the element <style:font-face>
-
This attribute is not supported in Word 2013, Word 2016, or Word 2019.
b. The standard defines the attribute svg:underline-position, contained within the element <style:font-face>, contained within the parent element <office:font-face-decls>
-
This attribute is not supported in Excel 2013, Excel 2016, or Excel 2019.