This is the base DN, where searches are made. It is used in
similar way as with all LDAP modules. For more information, see Section 3.9.1. BaseDN.
Special formatting
characters are permitted. %0 is replaced by the host
counter. It is an integer that starts at 1 and counts the
searches made for a given request. %1 is replaced by the
realm of the user name in the current request.