diff --git a/exchangelib/autodiscover/protocol.py b/exchangelib/autodiscover/protocol.py
index 473d793c..9d2ec777 100644
--- a/exchangelib/autodiscover/protocol.py
+++ b/exchangelib/autodiscover/protocol.py
@@ -1,3 +1,4 @@
+from ..properties import UserResponse
 from ..protocol import BaseProtocol
 from ..services import GetUserSettings
 from ..transport import get_autodiscover_authtype
@@ -45,6 +46,11 @@ def get_user_settings(self, user, settings=None):
                 "external_ews_url",
                 "ews_supported_schemas",
             ]
+        for setting in settings:
+            if setting not in UserResponse.SETTINGS_MAP:
+                raise ValueError(
+                    f"Setting {setting!r} is invalid. Valid options are: {sorted(UserResponse.SETTINGS_MAP.keys())}"
+                )
         return GetUserSettings(protocol=self).get(users=[user], settings=settings)
 
     def dummy_xml(self):
diff --git a/tests/test_autodiscover.py b/tests/test_autodiscover.py
index b7f47c1f..670fb5a4 100644
--- a/tests/test_autodiscover.py
+++ b/tests/test_autodiscover.py
@@ -256,6 +256,14 @@ def test_get_user_settings(self, m):
         ad.discover()
         p = autodiscover_cache[ad._cache_key]
 
+        # Test invalid settings
+        with self.assertRaises(ValueError) as e:
+            p.get_user_settings(user=None, settings=["XXX"])
+        self.assertIn(
+            "Setting 'XXX' is invalid. Valid options are:",
+            e.exception.args[0],
+        )
+
         # Test invalid email
         invalid_email = get_random_email()
         r = p.get_user_settings(user=invalid_email)