diff --git a/orchestration/sharepoint_renamer_orchestrator.py b/orchestration/sharepoint_renamer_orchestrator.py
index 15917f0a2..3159a607b 100644
--- a/orchestration/sharepoint_renamer_orchestrator.py
+++ b/orchestration/sharepoint_renamer_orchestrator.py
@@ -67,7 +67,14 @@ class SharepointRenamerOrchestrator:
         self._dry_run = dry_run
 
     def _discover_roots(self) -> list[str]:
-        raise NotImplementedError
+        contents = self._sp_client.get_folders_in_path(BASE_PATH)
+        batch_roots = sorted(
+            f"{BASE_PATH}/{item['name']}"
+            for item in contents.get("value", [])
+            if "folder" in item
+            and item["name"].lower().startswith(BATCH_FOLDER_PREFIX.lower())
+        )
+        return [BASE_PATH, *batch_roots]
 
     def run(self) -> None:
         with open(self._csv_path, newline="", encoding="utf-8-sig") as f: