Ensure ICA sessions are connected to the MetaFrame server.
With no ICA sessions to the MetaFrame server:
1. Open Performance Monitor and select + to add to the graph.
2. From the Performance Object drop-down list, select ICA Session and a desired counter.
3. The Add button is grayed out.
4. Make an ICA connection to the server.
5. Repeat Steps 1 and 2. The Add button is now available and you can select an instance to monitor.