OpenLdap proxy CN case-sensitive

I am having a web app开发者_StackOverflow中文版 which needs to cache a notes ldap. For that the IT installed Openldap which will be queried from the web app. Basically OpenLdap Proxy. now CN=My User, O=Corp comes over as cn=My User, o=Corp... (notice the case CN vs. cn, etc)

Can I adjust something in slapd.conf that tells my mapping to be case-sensitive?

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These are case-insensitive by design, according to the specification, see RFC 4514 and RFC 4512, more specifically, section 1.4:

Short names, also known as descriptors, are used as more readable aliases for object identifiers. Short names are case insensitive and conform to the ABNF:

  descr = keystring

It's not clear what you're trying to do with your application, but libraries that handle such distinguished names should be able to handle that in theory.