What do you mean by "setup ldap on my apache server"?
I haven't tried it, but the ldap_auth plugin should work without any modifications with 1.8.
I have tried it and meanwhile I was copiying the exact Data which made elgg 1.7.10 connect to LDAP in the LDAP-Settings of 1.8 it could not connect and authenticate any in my LDAP-Server registered user.
Please test the LDAP-Plugin for 1.8 since it is one of the most important plugins!
best
fahl5
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