Hi, on R11.1 IM need One-x or Spaces. I don't have tested yet.
From the manual:
Enabling instant messaging
About this task
BBefore you complete this configuration, the console status bar displays IM disconnected.
[ul]
[li]For non-cloud systems, IM functionality is provided by either Avaya Spaces or Avaya one-X® Portal for IP Office.[/li]
[/ul]
[ul]
[li]For cloud systems, IM functionality is provided by Avaya Spaces.
[/li]
[/ul]
Procedure
Click Preferences Preferences.
Select Instant Messaging.
Select Enable instant messaging if you want to use IM with the console.
Click OK to save your change.