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RDS Server - TCP Availability service

The RDS Server TCP Availability service, formerly Terminal Server service, monitors the availability of the Microsoft Windows Terminal Services, which allows remote login to a server using the Microsoft Remote Desktop client. 

During the monitoring process, the service uses the Windows probe to track the terminal server's key activities. The results are then displayed on the status dashboard for the service.

When adding your RDS server as a device, ensure that you select Server - Windows as the Class. The Operating System must be a server.

Service Type WMI
Instances on a Device 1
Supported Systems/Applications Microsoft Windows Terminal Services
Device Class Server - Windows
Monitored By Windows probe, SolarWinds N-central server
Scan Interval 15 minutes
WMI Class The default value for WMI Class is Win32_PerfRawData_TermService_TerminalServices which should be used for most Server - Windowss. For servers using Windows 2008 or Windows Vista SP1, however, the WMI Class should be set to Win32_PerfRawData_LocalSessionManager_TerminalServices.

Properties queried and calculations performed

Namespace root\cimv2
WMI Class Win32_PerfRawData_TermService_TerminalServices
WMI Property 0 ActiveSessions
WMI Property 1 InactiveSessions
WMI Property 2 TotalSessions

Status details

Threshold Description
Active sessions Counts the sessions that are currently connected and have users logged on.
Inactive sessions

Counts the sessions that are:

  • Waiting for the initial connection,
  • both connected and waiting for users to log on, or
  • both disconnected and a user is logged on.

For more information, refer to the table below.

Total sessions The sum of the active and inactive sessions.

Examples of active and inactive session counts

Example Session Count
Terminal Server Shutting Down

Active Session Count = 0

Inactive Session Count = 0

Total Sessions = 0

Terminal Server Freshly Started

Active Session Count = 0

Inactive Session Count = 1

Total Sessions = 1

Session Connected But Not Logged On

Active Session Count = 0

Inactive Session Count = 2

Total Sessions = 2

Session Connected AND Logged On

Active Session Count = 1

Inactive Session Count = 1

Total Sessions = 2

Session Disconnected BUT Logged On

Active Session Count = 0

Inactive Session Count = 2

Total Sessions = 2