The procedure to stop the Threshold Monitoring is as follows:
On the global navigation tab, click Network.
The registered FC switches are displayed on the Main pane.
On the Main pane, click the target FC switch.
On the Category pane, click Performance.
On the Performance pane, click Threshold Monitoring.
The current status is displayed on the Main pane.
On the Action pane, click Stop Monitoring under Thresholds Setting.