diff --git a/parsedmarc/mail/graph.py b/parsedmarc/mail/graph.py
index 7713d45..6f3dbcc 100644
--- a/parsedmarc/mail/graph.py
+++ b/parsedmarc/mail/graph.py
@@ -289,10 +289,6 @@ class MSGraphConnection(MailboxConnection):
                 parent_folder_id = folder_id
             return self._find_folder_id_with_parent(path_parts[-1], parent_folder_id)
         else:
-            # Shared mailboxes can fail root listing; try well-known folders first.
-            well_known_folder_id = self._get_well_known_folder_id(folder_name)
-            if well_known_folder_id:
-                return well_known_folder_id
             return self._find_folder_id_with_parent(folder_name, None)
 
     def _get_well_known_folder_id(self, folder_name: str) -> Optional[str]:
@@ -302,7 +298,7 @@ class MSGraphConnection(MailboxConnection):
             return None
 
         url = f"/users/{self.mailbox_name}/mailFolders/{alias}?$select=id,displayName"
-        folder_resp = self._client.get(url)
+        folder_resp = self._request_with_retries("get", url)
         if folder_resp.status_code != 200:
             return None
         payload = folder_resp.json()
diff --git a/tests.py b/tests.py
index 6807477..0b9d3cf 100755
--- a/tests.py
+++ b/tests.py
@@ -1346,16 +1346,50 @@ class TestMSGraphFolderFallback(unittest.TestCase):
         connection = MSGraphConnection.__new__(MSGraphConnection)
         connection.mailbox_name = "shared@example.com"
         connection._client = _FakeGraphClient()
+        connection._request_with_retries = MagicMock(
+            side_effect=lambda method_name, *args, **kwargs: getattr(
+                connection._client, method_name
+            )(
+                *args, **kwargs
+            )
+        )
 
-        folder_id = connection._find_folder_id_from_folder_path("Inbox")
+        folder_id = connection._find_folder_id_with_parent("Inbox", None)
         self.assertEqual(folder_id, "inbox-id")
+        connection._request_with_retries.assert_any_call(
+            "get", "/users/shared@example.com/mailFolders?$filter=displayName eq 'Inbox'"
+        )
+        connection._request_with_retries.assert_any_call(
+            "get", "/users/shared@example.com/mailFolders/inbox?$select=id,displayName"
+        )
 
     def testUnknownFolderStillFails(self):
         connection = MSGraphConnection.__new__(MSGraphConnection)
         connection.mailbox_name = "shared@example.com"
         connection._client = _FakeGraphClient()
+        connection._request_with_retries = MagicMock(
+            side_effect=lambda method_name, *args, **kwargs: getattr(
+                connection._client, method_name
+            )(
+                *args, **kwargs
+            )
+        )
 
         with self.assertRaises(RuntimeWarning):
             connection._find_folder_id_from_folder_path("Custom")
+
+    def testSingleSegmentPathAvoidsExtraWellKnownLookupWhenListingSucceeds(self):
+        connection = MSGraphConnection.__new__(MSGraphConnection)
+        connection.mailbox_name = "shared@example.com"
+        connection._find_folder_id_with_parent = MagicMock(return_value="custom-id")
+        connection._get_well_known_folder_id = MagicMock(return_value="inbox-id")
+
+        folder_id = connection._find_folder_id_from_folder_path("Inbox")
+
+        self.assertEqual(folder_id, "custom-id")
+        connection._find_folder_id_with_parent.assert_called_once_with("Inbox", None)
+        connection._get_well_known_folder_id.assert_not_called()
+
+
 if __name__ == "__main__":
     unittest.main(verbosity=2)