Integration of Avaya and Microsoft Office Communications Server 2007 R2 in RCC mode?

Question

Microsoft

Good afternoon.
Question for Avaya and/or Microsoft Office Communications Server 2007 R2 experts.
There is: Avaya telephone infrastructure (PBX, Application Enablement Services (AES) server, Communication Manager server), Microsoft Office Communications Server 2007 (OCS) R2 (Enterprise Pool, 1 Front-End server and 2 Mediation Server) and, of course, Active Directory on Windows Server 2008.
Task: Implement Avaya and OCS integration in Remote Call Control (RCC) mode.
Problem: The AES server cannot get the list of OCS users (and therefore their phone numbers) from the domain controller. LDAP requests from the AES server to the domain controller are going well, there are no errors. Just the list of users is returned empty :-(
Questions:Has anyone experienced integrating Avaya and OCS? If so, has there been a problem similar to mine? How did they decide?
Z.Y. All settings were made according to the official instructions (Application Notes for Microsoft Office Communicator 2007 R2 Remote Call Control (RCC) Integration with Avaya Communication Manager Telephones).
Z.Z.Y. Software versions: AES: r5-2-2-105-0, CM: R015x.02.1.016.4.

Answer 1

If LDAP queries are made without errors, but an empty list is returned, then the reason is in the query parameters. Make sure that the given parameters (especially the DN-string) are correct. More than once I encountered problems with integration with AD due to insufficient experience with LDAP.
At one time, LDAP Browser helped me - a simple utility that will allow you to check the parameters you set. As soon as you achieve a non-empty list return in this program, transfer query parameters to your project.