diff --git a/src/StarfaceOutlookSync/Services/StarfaceApiClient.cs b/src/StarfaceOutlookSync/Services/StarfaceApiClient.cs
index 6e07b8be..e8b5f556 100644
--- a/src/StarfaceOutlookSync/Services/StarfaceApiClient.cs
+++ b/src/StarfaceOutlookSync/Services/StarfaceApiClient.cs
@@ -252,11 +252,20 @@ namespace StarfaceOutlookSync.Services
             if (book.Type == "user" && !string.IsNullOrEmpty(book.UserId))
                 query = $"?userId={book.UserId}";
 
-            var content = new StringContent(sfContact.ToString(), Encoding.UTF8, "application/json");
-            var resp = await _http.PostAsync($"{_baseUrl}/contacts{query}", content);
-            if (!resp.IsSuccessStatusCode) return null;
+            var body = sfContact.ToString();
+            OnDebug?.Invoke($"POST /contacts{query} Body:\n{body}");
 
-            var created = JObject.Parse(await resp.Content.ReadAsStringAsync());
+            var content = new StringContent(body, Encoding.UTF8, "application/json");
+            var resp = await _http.PostAsync($"{_baseUrl}/contacts{query}", content);
+            var respBody = await resp.Content.ReadAsStringAsync();
+
+            if (!resp.IsSuccessStatusCode)
+            {
+                OnDebug?.Invoke($"POST /contacts fehlgeschlagen: {(int)resp.StatusCode} {resp.StatusCode}\n{respBody}");
+                return null;
+            }
+
+            var created = JObject.Parse(respBody);
             return MapFromStarface(created);
         }
 
diff --git a/src/StarfaceOutlookSync/Services/SyncEngine.cs b/src/StarfaceOutlookSync/Services/SyncEngine.cs
index 06691d81..3b4057f5 100644
--- a/src/StarfaceOutlookSync/Services/SyncEngine.cs
+++ b/src/StarfaceOutlookSync/Services/SyncEngine.cs
@@ -247,6 +247,7 @@ namespace StarfaceOutlookSync.Services
                                 else
                                 {
                                     // Neu -> in Starface erstellen
+                                    Log($"  Erstelle in Starface: {oc.DisplayName}");
                                     var created = await starface.CreateContactAsync(oc, profile.StarfaceAddressBook);
                                     if (created != null && !string.IsNullOrEmpty(created.StarfaceId))
                                     {
@@ -260,6 +261,11 @@ namespace StarfaceOutlookSync.Services
                                         result.Created++;
                                         Log($"  Erstellt (OL->SF): {oc.DisplayName}");
                                     }
+                                    else
+                                    {
+                                        Log($"  FEHLER: Kontakt konnte nicht erstellt werden: {oc.DisplayName}");
+                                        result.Errors++;
+                                    }
                                 }
                             }
                             catch (Exception ex)