diff --git a/releasenotes/notes/add-immutable-user-source-support-dd17772a997075e0.yaml b/releasenotes/notes/add-immutable-user-source-support-dd17772a997075e0.yaml
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+---
+features:
+  - |
+    Add a new config setting ``immutable_user_source`` in the
+    ``[identity-feature-enabled]`` group that defaults to false.
+    This setting, combined with the usage of the ``@testtools.skipIf()``
+    decorator, will allow tests that require user creation, deletion,
+    or modification to skip instead of failing in environments that
+    are LDAP-backed. In such environments, the user source is read-only,
+    so this feature flag is needed to allow such tests to gracefully skip
+    without having to blacklist them.