diff --git a/app/services/quickwin_snapshot_service.py b/app/services/quickwin_snapshot_service.py
index 5d84183..6ef3575 100644
--- a/app/services/quickwin_snapshot_service.py
+++ b/app/services/quickwin_snapshot_service.py
@@ -40,17 +40,47 @@ def _connect_vcenter(endpoint, user, password):
 
 
 def _find_vm(si, vm_name):
-    """Cherche une VM par nom dans le vCenter. Retourne l'objet VM ou None."""
+    """Cherche une VM par nom dans le vCenter.
+       Matching tolérant :
+         1. nom exact (insensible à la casse)
+         2. partie courte avant le 1er '.' (ex: 'vrexpbtex1' == 'vrexpbtex1.sanef.groupe')
+       Logue un échantillon de VMs vues pour faciliter le debug en cas d'échec.
+    """
+    target_full = (vm_name or "").lower().strip()
+    short = target_full.split(".")[0]
+    if not short:
+        return None
+
     content = si.RetrieveContent()
     container = content.viewManager.CreateContainerView(
         content.rootFolder, [vim.VirtualMachine], True)
+    total = 0
+    exact_match = None
+    short_match = None
+    samples = []
     try:
         for vm in container.view:
-            if vm.name.lower() == vm_name.lower():
-                return vm
+            total += 1
+            if not vm.name:
+                continue
+            n = vm.name.lower().strip()
+            if exact_match is None and n == target_full:
+                exact_match = vm
+            elif short_match is None and n.split(".")[0] == short:
+                short_match = vm
+            if len(samples) < 5 and n.startswith(short[:3]):
+                samples.append(vm.name)
     finally:
         container.Destroy()
-    return None
+
+    found = exact_match or short_match
+    if found is None:
+        log.info(f"_find_vm({vm_name}): no match parmi {total} VMs ; "
+                 f"samples startswith '{short[:3]}': {samples}")
+    else:
+        kind = "exact" if exact_match else "short"
+        log.info(f"_find_vm({vm_name}): {kind} match → {found.name}")
+    return found
 
 
 def _take_snapshot(vm, snap_name, description=""):