when setting "referral=ignore" property in LDAPLoginModule, AMQ broker sends a LDAP control "Manage DSA IT LDAPv3 control" (OID: 2.16.840.1.113730.3.4.2) to the Microsoft AD server indicating suppression of referral object (LDAP server should not send back a referral object). However, in some cases, the MicrosSoft AD server with incomplete configuration might just ignored the LDAP control (OID: 2.16.840.1.113730.3.4.2) and still sends back a referral object regardless. Then, AMQ broker just threw an UNEXPECTED_MESSAGE error and closed the connection.

We might need to reconsider this behaviour by ignoring the referral object that was sent back from the Microsoft AD server.