I'm sorry, I send my issue to the wrong mailinglist at first (to the bugs list) and then tried to send it to technical twice. It doesnt seem to go through. Do you have any idea which column it is that defines this behaviour? I can't seem to find it..

It is not a boolean, but rather a separate field. As far as I recall, in the original design uppercasing was intended as a form of normalization. In table "ldap_attr_mappings" you find a "sel_expr_u" that contains the "uppercasing" select expression. If not given, and if an uppercasing function is known, it is constructed as "<uppercasing>(<sel_expr>)", but you have a chance to provide a specific one. Please test and report through the openldap-technical mailing list, unless you find a bug.

p.