Connection refused by proxy server (ICM_HTTP_PROXY_CONN_REFUSED)

What causes this issue?

The proxy server has rejected the connection.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Ensure that the proxy server is reachable at the specified port number.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.