The VDA machines where the Session Recording Agent is installed records the following warning event in the Event log:

Event ID: 3031
Source: Citrix Session Recording Agent

Message: Exception caught while running record policy query. IIS setting for Session Recording doesn't allow HTTP connections from Session Recording Agent. 

--- Exception Details ---
Type: System.Net.WebException
Message: The remote server returned an error: (403) Forbidden.
Stack trace:
Server stack trace:
   at System.Runtime.Remoting.Channels.Http.HttpClientTransportSink.ProcessResponseException(WebException webException, HttpWebResponse& response)
   at System.Runtime.Remoting.Channels.Http.HttpClientTransportSink.ProcessMessage(IMessage msg, ITransportHeaders requestHeaders, Stream requestStream, ITransportHeaders& responseHeaders, Stream& responseStream)
   at System.Runtime.Remoting.Channels.BinaryClientFormatterSink.SyncProcessMessage(IMessage msg)
Exception rethrown at [0]:
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at SmAudBroker.RecordPolicy.RunRecordPolicyQuery(RecordPolicyQuery query, RecordPolicyQueryResult& result)
   at SmAudAgent.MetaDataQuerier.RunRecordPolicyQuery(QueryArgs query)
   at SmAudAgent.MetaDataQuerier.QueryNextSessionDue()

Apart from this event, we may also see error logged in the event logs (either with HTTP 403 (Forbidden) or HTTP 401 Unauthorized.

Event ID : 3027
Source: Session Recording Agent
Message: Exception caught while sending poll message to Session Recording Broker.

--- Exception Details ---
Type: System.Net.WebException
Message: The remote server returned an error: (403) Forbidden.

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Access to the Session Recording broker server was too restrictive.

Users may notice that when launching their ICA sessions, they no longer see the Session Recording Notification message and the administrators do not see the Sessions being recorded.