Probably should have been clearer: This happens in a report written in latex based on the csv file.

Can you post some files so that we can figure out exactly what you mean?

The problem was that in my (home made) report, letters with diacritical marks that appeared in the sample student file, in particular the ü* in "Bienvenüe Alexis", and the *ë and *è* in "Noël Père" were not printing, resulting in "Bienvene Alexis" and "Nol Pre". Which was annoying and also a little disrespectful, I thought.

After a lot of weird kludgy attempts, the solution turned out to be easy: Just add

\usepackage[utf8]{inputenc}

to the preamble.

Again, this was not a problem with AMC at all. It was with the report I was writing using data from the exported *.csv file.