We have setup an HA Portal configuration and cannot get the standby Portal to pass the health check. Keeping getting an error that the /sharing/rest endpoint cannot be reached. In /portaladmin/machines the machine is listed and shows as standby:

If we check status get

The portal log on the standby machine just shows over and over that it cannot reach the endpoint
<Msg time="2023-07-12T13:44:00,470" type="WARNING" code="209041" source="Portal Admin" process="9564" thread="1" methodName="" machine="WSVESRIPORTQ200.domain.LOC" user="" elapsed="" requestID="">Unable to reach the ArcGIS Portal Directory https://wsvesriportq200.domain.loc:7443/arcgis/sharing/rest. Restart the Portal for ArcGIS service and try again. If the problem persists, contact Esri technical support (U.S.) or your distributor (customers outside the U.S.).</Msg>
<Msg time="2023-07-12T13:44:00,470" type="WARNING" code="218037" source="Portal Admin" process="9564" thread="1" methodName="" machine="WSVESRIPORTQ200.domain.LOC" user="" elapsed="" requestID="">Health Check failed, the portal is not ready.</Msg>
<Msg time="2023-07-12T13:44:11,814" type="INFO" code="216005" source="Portal" process="9576" thread="1" methodName="" machine="WSVESRIPORTQ200.domain.LOC" user="" elapsed="" requestID="">HA: Node wsvesriportq200.domain.loc is configured to be standby.</Msg>
<Msg time="2023-07-12T13:44:11,829" type="INFO" code="216001" source="Portal" process="9576" thread="1" methodName="" machine="WSVESRIPORTQ200.domain.LOC" user="" elapsed="" requestID="">HA: Getting the primary connection information from the recovery.conf file</Msg>
<Msg time="2023-07-12T13:44:11,829" type="INFO" code="216050" source="Portal" process="9576" thread="1" methodName="" machine="WSVESRIPORTQ200.domain.LOC" user="" elapsed="" requestID="">HA: The primary server wsvesriportq100.domain.loc is identical to the master wsvesriportq100.domain.loc.</Msg>
<Msg time="2023-07-12T13:44:11,829" type="INFO" code="216006" source="Portal" process="9576" thread="1" methodName="" machine="WSVESRIPORTQ200.domain.LOC" user="" elapsed="" requestID="">HA: Monitoring the master node.</Msg>
<Msg time="2023-07-12T13:45:00,455" type="WARNING" code="209041" source="Portal Admin" process="9564" thread="1" methodName="" machine="WSVESRIPORTQ200.domain.LOC" user="" elapsed="" requestID="">Unable to reach the ArcGIS Portal Directory https://wsvesriportq200.domain.loc:7443/arcgis/sharing/rest. Restart the Portal for ArcGIS service and try again. If the problem persists, contact Esri technical support (U.S.) or your distributor (customers outside the U.S.).</Msg>
<Msg time="2023-07-12T13:45:00,455" type="WARNING" code="218037" source="Portal Admin" process="9564" thread="1" methodName="" machine="WSVESRIPORTQ200.domain.LOC" user="" elapsed="" requestID="">Health Check failed, the portal is not ready.</Msg>
We have restarted, rebooted, and even re-installed on the problem persists. We have turned off domain firewall to see if it might be a firewall issue. The machine is part of a Windows cluster, but don't think that should cause a problem.
Any thoughts @JonathanQuinn
Thanks -Joe