Event ID 1300 — RD Connection Broker Communication

Applies To: Windows Server 2008 R2

Remote Desktop Connection Broker (RD Connection Broker), formerly Terminal Services Session Broker, is a Remote Desktop Services role service in Windows Server 2008 R2 that supports session load balancing between RD Session Host servers in a farm, connections to virtual desktops, and reconnection to an existing session in a load-balanced RD Session Host server farm. For RD Connection Broker to work properly, the RD Session Host server must be able to communicate with the RD Connection Broker server across the network.

Event Details

Product: Windows Operating System
ID: 1300
Source: Microsoft-Windows-TerminalServices-SessionBroker-Client
Version: 6.1
Message: Remote Desktop Connection Broker Client rejected a call from an unauthorized ip address %1.


No action is required

This issue can typically be ignored.


To verify that the RD Session Host server can successfully communicate with the RD Connection Broker server:

  1. On the RD Session Host server, start a new Remote Desktop Services session.
  2. After the session is established, disconnect the session. Do not log off from the session.
  3. On a different RD Session Host server, try to reconnect to your existing session. If you are able to reconnect to the existing session, the RD Session Host server is successfully communicating with the RD Connection Broker server.

RD Connection Broker Communication

Remote Desktop Services