Hi, I was able to successfully test simple authentication support of IBM Directory Server (IDS) in ovirt. Next step is to test "DIGEST-MD5" support. This protocol is currently supported by my test IDS. But I get - javax.naming.CommunicationException: [LDAP: error code 2 - Protocol Error] When a call is made to construct InitialDirContext with following settings - {java.naming.provider.url=ldap://ldapserver.ibm.com:389, java.naming.factory.initial=com.sun.jndi.ldap.LdapCtxFactory, java.naming.security.principal=uid=1234567,c=us,ou=ldapserver,o=ibm.com, java.naming.security.authentication=DIGEST-MD5 GSSAPI, java.naming.security.credentials=password, java.naming.referral=follow, java.naming.ldap.attributes.binary=objectGUID} Do you know what could be going wrong here? I think its something wrong with my usage and not in code. What test cases were run to verify RedHat DS support? I can try to run the same for IBM DS before posting the patch. Thanks Sharad Mishra IBM