Published Desktop session running on XenApp 6 from a client with multiple monitors attached appears as a single monitor session.

True Multi-Monitor Support is a feature of XenApp 6 running on Windows Server 2008 R2. When a multiple monitor client connects to a session, XenApp creates the same number of monitors as supported by the client, and treats these as proper monitors inside the ICA session.

This means that applications running inside the ICA session behave like they are running on a client device with the same number of monitors.

When a client connects to a Published Desktop in the windowed mode (as opposed to full screen), only a single monitor is created initially in the session. An issue can occur if Shadowing is enabled for the session.

This issue is by design.

Workaround

A potential workaround to this issue is to disable Shadowing for the session using Citrix Polices.

Problem Cause

Citrix does not currently support Shadowing multiple monitor sessions because of a limitation in the underlying Operating System.
When the connection is established initially, if Shadowing is enabled for the session, only a single monitor is created and supported in the session.