Monitors verify that the ISA Server 2006 is properly configured for domain authentication.
The Dashboard view lists the connectivity status by group.
If all servers in a group are responsive (and within the specified response time threshold),
the group status reflects that the servers in the group are responsive.
If any server in the group is not responsive in a timely manner,
the group status displayed reflects the worst-case status for that group;
for example, Slow connectivity or No connection.
Follow this steps to check the corresponding connectivity verifier:
In the console tree of ISA Server Management, click Monitoring.
In the details pane, click the Connectivity Verifiers tab and select the applicable verifier.
Check for the status in the Results column.
If the status is other than "Good", then you could check in the Alert tab.
In the details pane, click the Alert tab and select the applicable alert message to get detail information.