Hi Christian,
I’ll need a bit more information about your directory settings to determine why the users are not appearing. Here are a few questions:
1. Did you select any user roles for hiding or select any specific users for exclusion?
2. If you chose “Display Name” as the sort field, do any of the display names begin with non-alphabetic characters (e.g. a number or special character)? If you chose “Last Name” as the sort field, do any of the last names begin with non-alphabetic characters?
Thanks!
Sarah