[Elastic Agent] Fix default configuration after enroll (#18232)

* fix enroll

* changelog

* changelog

x-pack/elastic-agent/CHANGELOG.asciidoc

@@ -30,6 +30,7 @@
 - Use default output by default {pull}18091[18091]
 - Use /tmp for default monitoring endpoint location for libbeat {pull}18131[18131]
 - Fix panic and flaky tests for the Agent. {pull}18135[18135]
+- Fix default configuration after enroll {pull}18232[18232]
 
 ==== New features
 

x-pack/elastic-agent/_meta/elastic-agent.fleet.yml

@@ -1,27 +1,27 @@
-#================================ General =====================================
+# ================================ General =====================================
 # Beats is configured under Fleet, you can define most settings
 # from the Kibana UI. You can update this file to configure the settings that
 # are not supported by Fleet.
-# management:
-#   mode: "fleet"
+management:
+  mode: "fleet"
 
-#   # Check in frequency configure the time between calls to fleet to retrieve the new configuration.
-#   #
-#   # Default is 30s
-#   #checkin_frequency: 30s
+  # Check in frequency configure the time between calls to fleet to retrieve the new configuration.
+  #
+  # Default is 30s
+  #checkin_frequency: 30s
 
-#   # Add variance between API calls to better distribute the calls.
-#   #jitter: 5s
+  # Add variance between API calls to better distribute the calls.
+  #jitter: 5s
 
-#   # The Elastic Agent does Exponential backoff when an error happen.
-#   #
-#   #backoff:
-#   #
-#   # Initial time to wait before retrying the call.
-#   # init: 1s
-#   #
-#   # Maximum time to wait before retrying the call.
-#   # max: 10s
+  # The Elastic Agent does Exponential backoff when an error happen.
+  #
+  #backoff:
+  #
+  # Initial time to wait before retrying the call.
+  # init: 1s
+  #
+  # Maximum time to wait before retrying the call.
+  # max: 10s
 
 # download:
 #   # source of the artifacts, requires elastic like structure and naming of the binaries