LDAP settings push using FortiManager

Hi guys, I am trying to push LDAP settings to two firewalls that are using same LDAP server but with different service account.

I use per-device mapping to add two FortiGate with different username and password for LDAP binding account but when I push it to firewall, although it get the right username but password is not being pushed right and as a result account get locked in AD. Anyone can guide how can i do this? Do i need to have same password for both account? My understanding is that FMG should push the settings in per-device mapping.