dn: olcOverlay={0}rwm,olcDatabase={-1}frontend,cn=config

objectClass: olcOverlayConfig

objectClass: olcRwmConfig

olcOverlay: {0}rwm

olcRwmRewrite: {0}rwm-rewriteEngine "on"

olcRwmRewrite: {1}rwm-rewriteMap "ldap" "attr2dn" "ldap://localhost/dc=abcd,dc

 =net?dn?sub"

olcRwmRewrite: {2}rwm-rewriteContext "bindDN"

olcRwmRewrite: {3}rwm-rewriteRule "^mail=[^,]+@[^,]+$" "${attr2dn($0)}" ":@I"

olcRwmTFSupport: false

olcRwmNormalizeMapped: FALSE

ldapsearch -x -D "cb@abcd.net" -W -b 'dc=abcd,dc=net' -H ldap://openldap1.abcd.net/ 'uid=cb' 

Enter LDAP Password: 

ldap_bind: Invalid DN syntax (34)

additional info: invalid DN