I can see atal: proxy:ldap:/opt/zimbra/conf/ldap-vad.cf(0,lock|fold_fix): table lookup problem is logs you pasted.
does the password in opt/zimbra/conf/ldap-vad.cf is correct and matches that in zmlocalconfig ?
zmlocalconfig -s | grep -i pass
you are interested in ldap_postfix_password =
cat ldap-vad.cf
bind_pw =
These should match