The PBX link is what DuVoice uses to forward name and COS updates to the IP Office.
Depending on existing settings, the PBX link integration may stop working.
C:\Program Files (x86)\Avaya\IP Office Admin Suite\Manager and should be copied to C:\Program Files (x86)\DuVoice DV2000. LegacySettings.dllSecurityManager.dllUpgdWiz.dllWhoIs2.dllWindowsControlLibrary.dllValidationVisability.dllCoreServices.dll