The primary log directory for Avaya IX Messaging application services is IX-Messaging Install drive:\UC\IX\Logs. When troubleshooting data synchronization issues between the Consolidated Server (CS) and Voice Server Nodes (VSNs), this is the correct folder to investigate. It contains specific log files, such as DataSync.log, which records the activities and potential errors of the Data Sync service responsible for replicating data across the messaging network. Analyzing these logs is a critical step in diagnosing and resolving synchronization failures.

B. IX-Messaging Install drive > UC > Logs: This is an incorrect and overly generic path. The specific logs for the IX Messaging application are located within the \IX sub-directory.

C. IX-Messaging Install drive > UC > DB > Logs: This path is incorrect. While database-related logs might exist, the application-level logs for data synchronization are not stored here.

D. IX-Messaging Install drive > UC > Logs > DB: This is not the standard directory structure for Avaya IX Messaging application logs.

1. Avaya Aura® Messaging Documentation Library, "Troubleshooting Avaya Aura® Messaging" (Release 10.8, NN42050-711, Issue 1.0, December 2020).

Page 111, Section: Log files: "The log files for Avaya Aura® Messaging are located in the Install\drive:\UC\IX\Logs folder." This section explicitly confirms the correct log file path. It also lists DataSync.log as one of the key logs within this directory for troubleshooting.