When Session Recording Agent cannot connect, the Exception caught while sending poll messages to Session Recording Broker event message is logged, followed by the exception text. The exception text provides the reason why the connection failed. These reasons include:
The underlying connection was closed. Could not establish a trust relationship for the TLS secure channel. This exception means that the Session Recording Server is using a certificate that is signed by a CA that the server on which the Session Recording Agent resides does not trust, or have a CA certificate for. Alternatively, the certificate may have expired or been revoked.
Resolution: Verify that the correct CA certificate is installed on the server hosting the Session Recording Agent or use a CA that is trusted.
The remote server returned an error: (403) forbidden. This is a standard HTTPS error displayed when you attempt to connect using HTTP (nonsecure protocol). The computer hosting the Session Recording Server rejects the connection because it accepts only secure connections.
Resolution: Use Session Recording Agent Properties to change the Session Recording Broker protocol to HTTPS.
The Session Recording Broker returned an unknown error while evaluating a record policy query. Error code 5 (Access Denied). See the Event log on the Session Recording Server for more details. This error occurs when sessions are started and a request for a record policy evaluation is made. The error is a result of the Authenticated Users group (this is the default member) being removed from the Policy Query role of the Session Recording Authorization Console.
Resolution: Add the Authenticated Users group back into this role, or add each server hosting each Session Recording Agent to the PolicyQuery role.
The underlying connection was closed. A connection that was expected to be kept alive was closed by the server. This error means that the Session Recording Server is down or unavailable to accept requests. This could be due to IIS being offline or restarted, or the entire server may be offline.
Resolution: Verify that the Session Recording Server is started, IIS is running on the server, and the server is connected to the network.