Remote Desktop Connection Broker Client failed to redirect the user - Error: Null

Hello, 

I have a remote desktop services farm built on Windows Server 2012 R2. 

I have two Connection brokers in a HA setup, a single server with the web/gateway roles installed and two session hosts in a single session collection. 

The farm has been working well up until I ran the Set-RDWorkspace command to change the name from the default to the name of our organisation. 

The web and gateway seem to function fine but when I try and connect to the session collection I get the following error "This computer can't connect to the remote computer. 

I have tested network connectivity between both session hosts and connection brokers, all seems okay. 

In the "TerminalServices-SessionBroker-Client" logs in Event viewer the following error message is generated when a logon is attempted: "Remote Desktop Connection Broker Client failed to redirect the user - Error: Null". 

I am unsure if this issue is related to the "Set-RDWorkspace" command or that was just a coincidence


Thanks