File, Properties, will tell me the Y Maximum value for all glyph bounding boxes, but is there any way to find which character it is without manually searching the entire font or at least all ANSI characters?
No, their is no easy way. You could try a divide and conquer method; (without saving!) delete half of the glyphs, then check the properties to see if the Maximum has changed. If not delete another 50 percent and continue until the Maximum changes. You should be able to locate the specific glyph(s) in a couple of iterations.
gee, if I had come up with that solution I would have been laughed off the Forum …
DP