How many users are supported on Avaya IX™ Messaging 10.8 Single Server?

According to the official Avaya IX™ Messaging documentation, a single-server deployment of version 10.8 is engineered to support a maximum of 4,800 mailboxes, which equates to 4,800 users. This capacity limit is defined to ensure system performance, reliability, and stability under typical usage patterns. Exceeding this number would require a multi-server configuration to distribute the load and maintain service quality. The specified hardware and software resources for a single server are sized to handle the processing and storage demands of up to this user count.

A. 4,200: This number is lower than the officially documented maximum user capacity for a single-server deployment.

B. 4,500: This value is below the specified maximum limit of 4,800 users for a single server.

C. 4,600: This is an incorrect value that falls short of the system's tested and supported maximum user count.

1. Avaya. (December 2019). Avaya IX™ Messaging Overview and Specification (Release 10.8, Document Number: 16-603083, Issue 10). Page 11, Table "Avaya IX™ Messaging system capacities", Row "Maximum number of mailboxes", Column "Single server". The value is explicitly stated as "4,800".