[Fleet] unhealthy remote ES warning can be ignored

reference/fleet/remote-elasticsearch-output.md

@@ -59,6 +59,10 @@ The remote {{es}} cluster is now configured.
 
 If you have chosen not to automatically synchronize integrations, you need to make sure that for any integrations that have been [added to your {{agent}} policy](/reference/fleet/add-integration-to-policy.md), the integration assets have been installed on the remote {{es}} cluster. Refer to [Install and uninstall {{agent}} integration assets](/reference/fleet/install-uninstall-integration-assets.md) for the steps.
 
+::::{note}
+When you use a remote {{es}} output, {{fleet-server}} performs a test to ensure connectivity to the remote cluster. The result of that connectivity test is used to report the ES Remote output as healthy or unhealthy on the **Fleet** > **Settings** > **Outputs** page, under the **Status** column. In some cases, the remote {{es}} output used for data from {{agent}} may be reachable only by those agents and not by {{fleet-server}}, so the unhealthy state and an associated `Unable to connect` error that appears on the UI can be ignored.
+::::
+
 ## Automatic integrations synchronization
 
 ```{applies_to}