Remote desktop client randomly unable connect to the RDS farm
Recently I ran into a problem with an existing Remote Desktop Services 2012 R2 at a client site. The error occurred intermittently and after a number of retries, client could establish connection normally making the issue not always reproducible. This blog summarises the process of identifying the symptoms, possible causes, and the resolution steps.
The RDS farm consisted of two connection broker servers and two session hosts. The Remote Desktop Connection Broker is configured in HA mode using two DNS records pointing to two broker nodes for round robin. The session hosts are 2012 R2 based machines. The broker nodes also host the RD Web Access and RD gateway with one of the nodes assuming the RD Licensing role.
The end user encountered the following error when trying to connect:
Your computer can’t connect to the remote computer because the Connection Broker couldn’t validate the settings specified…
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