When I use label features with halos in ArcMap, whether using the standard or Maplex labeling engine, the halos in the exported map (PDF) are always shifted vertically, so that instead of the halo being evenly spaced around the text it is flush with the bottom and excessive on the top.
I know others have had this issue: Export Map to PDF Halo Labels shifts Halo to latter width at the end of Label Problem, but the proposed fix doesn't work, because the option to change vertical text alignment is grayed out. Has anyone else found a way to add halos to maps?