After changing apps password on EBS with FNDCPASS or AFPASSWD perform below steps to change password in OID provisioning profile.
Execute below command on OID server
oidprovtool operation=modify ldap_host=<OID_HOSTNAME> ldap_port=<OID_PORT> ldap_user_dn=<OID_ADMIN_USER> application_dn=<APPLICATION_DN>
application_dn = Run the following query as the APPS user
SELECT * FROM fnd_user_preferences WHERE preference_name = ‘USERNAME’
On prompt enter OID admin user password and interface_connect_info as below
If your EBS is integrated with OAM for SSO check EBS accessgate datasource. If user used in datasource is apps, update the datasource with new apps password.