Redmine

I am trying to achieve an LDAP auth with our Active Directory server but there is an issue with the binding.
As stated here: http://www.redmine.org/projects/redmine/wiki/RedmineLDAP
Account and Password must be either blank for anonymous access or provide a read-only user.
Thats the issue. Our servers require to provide my own binding as account name to be able to use authentication.
Since there is no generic read only user I must either enter my personal user to be used for everyone or otherwise provide some variable to it.

Basically the Account-Name should be the CN or user name of the user, and the entered password used for LDAP auth should be also the Account-Password to create a valid binding