Avaya IX™ Messaging, which is built upon the architecture of its predecessor Avaya Aura® Messaging and the legacy Octel platform, stores its primary application log files in a specific directory structure. The correct path is :\UC\OL\Logs. The "OL" in the path is a remnant of the original "Octel" product name. This directory contains essential logs for troubleshooting core messaging components, such as the Message Transfer Agent (MTA), Message Store, and other critical services.

A. IX-Messaging Install drive > UC > IX > Logs: This path is incorrect. While IX reflects the product branding, it is not used in the actual directory structure for log file storage.

B. IX-Messaging Install drive > UC > Logs: This path is too generic. The core application logs are located within a specific subdirectory, not directly under the UC folder.

D. IX-Messaging Install drive > UC > Admin > Logs: The Admin folder typically contains files related to the administration interface or tools, not the primary system and application logs.

1. Avaya Aura® Messaging Documentation Library, "Troubleshooting Avaya Aura® Messaging", Release 7.1, NN42050-711, Issue 10, November 2018.

Page 31, Chapter 3: Log files, Section: Messaging log files: "The Messaging application logs are located in the :\UC\OL\Logs directory." This section explicitly confirms the correct path for the core application logs.

2. Avaya Aura® Messaging Documentation Library, "Administering Avaya Aura® Messaging", Release 7.1, NN42050-701, Issue 13, November 2018.

Page 587, Chapter 13: Maintenance, Section: Log files: This chapter discusses various log files used for maintenance and troubleshooting, and references to log collection procedures consistently point to the \UC\OL\Logs directory as the source for critical messaging service logs.