diff --git a/app/customers/backend/router.py b/app/customers/backend/router.py
index 53d4390..1c2c8c9 100644
--- a/app/customers/backend/router.py
+++ b/app/customers/backend/router.py
@@ -288,6 +288,120 @@ async def update_customer(customer_id: int, update: CustomerUpdate):
         raise HTTPException(status_code=500, detail=str(e))
 
 
+@router.post("/customers/sync-economic-from-simplycrm")
+async def sync_economic_numbers_from_simplycrm():
+    """
+    🔗 Sync e-conomic customer numbers fra Simply-CRM til Hub customers.
+    
+    Henter cf_854 (economic_customer_number) fra Simply-CRM accounts og 
+    opdaterer matching Hub customers baseret på navn.
+    """
+    try:
+        from app.services.simplycrm_service import SimplyCRMService
+        
+        logger.info("🚀 Starting e-conomic number sync from Simply-CRM...")
+        
+        stats = {
+            "simplycrm_accounts": 0,
+            "accounts_with_economic_number": 0,
+            "hub_customers_updated": 0,
+            "hub_customers_not_found": 0,
+            "errors": 0
+        }
+        
+        async with SimplyCRMService() as simplycrm:
+            # Hent alle accounts fra Simply-CRM
+            logger.info("📥 Fetching accounts from Simply-CRM...")
+            query = "SELECT accountname, cf_854 FROM Accounts LIMIT 5000;"
+            accounts = await simplycrm.query(query)
+            
+            stats["simplycrm_accounts"] = len(accounts)
+            logger.info(f"✅ Found {len(accounts)} accounts in Simply-CRM")
+            
+            if not accounts:
+                return {
+                    "status": "success",
+                    "message": "No accounts found in Simply-CRM",
+                    "stats": stats
+                }
+            
+            # Filter accounts med economic customer number
+            accounts_with_economic = [
+                acc for acc in accounts 
+                if acc.get('cf_854') and str(acc.get('cf_854')).strip() not in ['', '0', 'null', 'NULL']
+            ]
+            
+            stats["accounts_with_economic_number"] = len(accounts_with_economic)
+            logger.info(f"✅ {len(accounts_with_economic)} accounts have e-conomic customer numbers")
+            
+            # Map company name → economic_customer_number
+            name_to_economic = {}
+            for acc in accounts_with_economic:
+                company_name = acc.get('accountname', '').strip()
+                economic_number = str(acc.get('cf_854', '')).strip()
+                
+                if company_name and economic_number:
+                    # Normalize navn til lowercase for matching
+                    name_key = company_name.lower()
+                    name_to_economic[name_key] = {
+                        'original_name': company_name,
+                        'economic_customer_number': economic_number
+                    }
+            
+            logger.info(f"📊 Mapped {len(name_to_economic)} unique company names")
+            
+            # Hent alle Hub customers
+            hub_customers = execute_query("SELECT id, name FROM customers")
+            logger.info(f"📊 Found {len(hub_customers)} customers in Hub")
+            
+            # Match og opdater
+            for customer in hub_customers:
+                customer_name_key = customer['name'].strip().lower()
+                
+                if customer_name_key in name_to_economic:
+                    economic_data = name_to_economic[customer_name_key]
+                    economic_number = economic_data['economic_customer_number']
+                    
+                    try:
+                        execute_query(
+                            """UPDATE customers 
+                               SET economic_customer_number = %s, 
+                                   last_synced_at = NOW() 
+                               WHERE id = %s""",
+                            (economic_number, customer['id'])
+                        )
+                        
+                        logger.info(f"✅ Updated {customer['name']} → e-conomic #{economic_number}")
+                        stats["hub_customers_updated"] += 1
+                        
+                    except Exception as update_error:
+                        logger.error(f"❌ Failed to update customer {customer['id']}: {update_error}")
+                        stats["errors"] += 1
+                else:
+                    stats["hub_customers_not_found"] += 1
+            
+            logger.info(f"✅ Sync complete: {stats}")
+            
+            # Auto-link tmodule_customers after sync
+            try:
+                logger.info("🔗 Running auto-link for timetracking customers...")
+                link_results = execute_query("SELECT * FROM link_tmodule_customers_to_hub()")
+                logger.info(f"✅ Linked {len(link_results)} timetracking customers")
+                stats["tmodule_customers_linked"] = len(link_results)
+            except Exception as link_error:
+                logger.warning(f"⚠️ Auto-linking failed (non-critical): {link_error}")
+            
+            return {
+                "status": "success",
+                "message": f"Synced {stats['hub_customers_updated']} customers with e-conomic numbers from Simply-CRM",
+                "stats": stats
+            }
+    
+    except Exception as e:
+        logger.error(f"❌ Simply-CRM sync failed: {e}")
+        raise HTTPException(status_code=500, detail=str(e))
+
+
 @router.post("/customers/{customer_id}/link-economic")
 async def link_economic_customer(customer_id: int, link_request: dict):
     """Manually link customer to e-conomic customer number"""