Events forwarding

Question

Hello Team,

I configured event forwarding on a server 2022 and all is working good from the internal network.
I need the collector server to be accessed from outside.
As a result, I configured the winRM on the client to use the server URL "https://server1.domain.com:5986" and on the ARR I have created a reverse proxy rule that redirect URL to the full path of the collector "https://server1.domain.com:5986/wsman/SubscriptionManager/WEC/{R:1}"
After that, I got the error below from the client:
The forwarder is having a problem communicating with subscription manager at address https://server1.domain.com:5986. Error code is 2150859026 and Error Message is <f:WSManFault xmlns:f="http://schemas.microsoft.com/wbem/wsman/1/wsmanfault" Code="2150859026" Machine="client machine name"><f:Message>The connection to the specified remote host was refused. Verify that the WS-Management service is running on the remote host and configured to listen for requests on the correct port and HTTP URL. </f:Message></f:WSManFault>.
Note that the ARR is a workgroup.

What is the solution ?

Thanks,

Alaa Elrayes