You can upgrade a system from Avaya Aura® MS 8.0.x or 10.x to the latest Avaya Aura® MS 10.y release by applying the 10.x upgrade on the existing Avaya Aura® MS appliance with the old software.

It is recommended to perform upgrades only during the maintenance window or at an off peak-usage time.

The upgrade procedures set the operational state of the media server to Pending Lock. The purpose of placing the media server in the Pending Lock state is to ensure that the system does not start any new sessions. After all the sessions on the server have ended, the server can be upgraded without disruption to any users.

When you are ready to upgrade the server, the operational state is set to Locked, which ends any remaining active sessions.

If the media server is set to Pending Lock before the upgrade maintenance window, then the system ends a minimum number of user sessions, if any.