Yes, it should be exact replica including data in two OID's should match OID1 same as OID2 (so that MIddle Tier Node details are already in OID2) else it will not work. Do let me know if OID2 is replica of OID1 , If yes I need to think otherwise. Regards Atul Kumar http://becomeAppsDBA.blogSpot.com Sushil Arige <sushil.arige@xxxxxxxxx> wrote: Hi Atul, Yes, we are trying to switch middle tier associated with OID1 to OID2. We have OID2 similar install as OID1 but does this needs to be exact replica? We checked the ports and credentials etc on OID2 and they are all correct. Thanks, Sushil On 5/17/07, Atul Kumar <atul_iiit@xxxxxxxxx> wrote: Sushil, I am not sure what do you mean by changing OID information as this is not clear from below explanation - 1. Do you have an Middle Tier1 associated with OID1 and now you wish to point to OID2 -- For this OID2 should be replica of OID1 (later you can disassociate OID2 from OID1) or ldap container which holds Middle Tier configuration (Context -> Products -> iAS -> ....) specific to Middle Tier1 should be available in OID2. If you have alraedy this in place (container in new OIID) and you are simply migrating to new OID server and getting invalid credentials, make sure new OID is Up and listening on SSL (636) ldap port as it will use SSL port by default also given in error message. Mail us if you have any other info or Ask other users at http://teachMeOracle.com/forum or http://foums.oracle.com Atul http://becomeAppsDBA.blogSpot.com Sushil Arige <sushil.arige@xxxxxxxxx > wrote: Has anyone seen this error while changing OID information in Infrastructure tab of OAS? Error message: Operation failed to pass validation. Data for the Application Server instance may not have been migrated to the new Internet Directory server. Please check Admin Guide for procedures. Error connecting to Oracle Internet Directory Server specified by <SERVERNAME>:636. Connecting as Application Server instance specified by 'orclApplicationCommonName=oasinstance1.<SERVERNAME>,cn=IAS Instances, cn=IAS, cn=Products, cn=OracleContext'. Base Exception : oracle.ias.repository.schema.SchemaException: Unable to establish secure connection to Oracle Internet Directory Server ldap://<SERVERNAME>:636/ Base Exception : javax.naming.AuthenticationException: [LDAP: error code 49 - Invalid Credentials] We have a distributed configuration with OAS on one machine and OID/SSO on another machine. The first time adding the OID information was successful without any issue but now getting the above error when we are trying to change the OID information to a new server. Is there any place on OAS server or metadatabase that it stores this information. Can we directly go and clear that information? Any tips or help is appreciated. Thanks, Sushil Atul Kumar Site Dedicated to Apps DBA's Forum Dedicated to Apps DBA's