Glad it was that simple
You might want to try removing the
Code:
include "/opt/zimbra/openldap/etc/openldap/schema/nis.schema"
include "/opt/zimbra/openldap/etc/openldap/schema/samba.schema"
lines, as well as the index and other related lines. Restart Zimbra and see if you get any errors.
Also don't forget to remove those admin extensions if you installed them.