diff --git a/app/services/itop_service.py b/app/services/itop_service.py
index adf4d0d..b79e816 100644
--- a/app/services/itop_service.py
+++ b/app/services/itop_service.py
@@ -322,9 +322,31 @@ def sync_from_itop(db, itop_url, itop_user, itop_pass):
 
 
 def sync_to_itop(db, itop_url, itop_user, itop_pass):
-    """Exporte les infos patching de PatchCenter vers iTop"""
+    """Exporte referentiel + serveurs de PatchCenter vers iTop"""
     client = ITopClient(itop_url, itop_user, itop_pass)
-    stats = {"updated": 0, "created": 0, "errors": []}
+    stats = {"updated": 0, "created": 0, "ref_created": 0, "errors": []}
+
+    # ─── Sync referentiel: environments, domains, zones ───
+    for pc_table, itop_class in [("environments", "Environnement"), ("domains", "DomaineApplicatif"), ("zones", "Zone")]:
+        # Get existing in iTop
+        existing_itop = set()
+        for item in client.get_all(itop_class, "name"):
+            existing_itop.add(item.get("name", "").lower())
+
+        # Get PatchCenter values
+        rows = db.execute(text(f"SELECT name FROM {pc_table} ORDER BY name")).fetchall()
+        for row in rows:
+            name = row.name
+            if name.lower() not in existing_itop:
+                r = client.create(itop_class, {
+                    "name": name,
+                    "org_id": "SELECT Organization WHERE name = 'MPCZ'",
+                })
+                if r.get("code") == 0:
+                    stats["ref_created"] += 1
+                    existing_itop.add(name.lower())
+                else:
+                    stats["errors"].append(f"{itop_class} '{name}': {r.get('message', '')[:60]}")
 
     # Get iTop VMs indexed by short name
     itop_vms = {}