diff --git a/reference/fleet/env-provider.md b/reference/fleet/env-provider.md
index ea80548aa7..c050b36098 100644
--- a/reference/fleet/env-provider.md
+++ b/reference/fleet/env-provider.md
@@ -18,3 +18,6 @@ foo=bar elastic-agent run
 
 The environment variable can be referenced as `${env.foo}`.
 
+::::{note}
+If you run the agent as a Linux or Windows service, you can also define the environment variables in the service manifest. Refer to the example in [Proxy Server connectivity using default host variables](/reference/fleet/host-proxy-env-vars.md).
+::::