I know, the Forums are full of those messages, but all I try - nothing works
here for me:

I have a NW OES Server running with latest patches and eDir and
iFolder on it. I'm not able to login to the iFolder, not with Administrator
nor with the iFolder Clients. It used to work.

When Apache starts, it shows the messages:
Configured LDAP was found ready to use
*Master[iFolder.domain.com][-1] ldap_simple_bind : Can't connect LDAP server
ldap *Master[iFolder.domain.com] down
Ldap initialization failed. Check LDAP and restart apache.

In tcpcon I see, that ldap and sldap is listening. Also with an LDAP Browser
I'm able to connect.
The server does have a secondary IP Address for the iFolder service, DNS

Does anybody have an idea?