Hi..

I need a trigger which will work anytime the Account Owner changes, update all Account Contacts to that same Owner as their related Account.

So I created a trigger..Which doesn't work..To test it i created a account with two contacts .So i get contact owner same as account owner.i manually changed one contact owner to another user

So my account owner ,contact1 owner are user1 and contact 2 owner is user2

and changed the account owner/Out of two,only one contac whose owner id is same as account changes and other doesnt.

This is my trigger ..Please help me where i am going wrong.

trigger Changeownertrigger on Account (after insert,after update) {
  
      Set<Id> accountIds = new Set<Id>(); 
      Map<Id, String> oldOwnerIds = new Map<Id, String>();
      Map<Id, String> newOwnerIds = new Map<Id, String>();
      Contact[] contactUpdates = new Contact[0]; 
     
      for (Account a : Trigger.new) 
      { 
         if (a.OwnerId != Trigger.oldMap.get(a.Id).OwnerId) 
         {
            oldOwnerIds.put(a.Id, Trigger.oldMap.get(a.Id).OwnerId); 
            newOwnerIds.put(a.Id, a.OwnerId); 
            accountIds.add(a.Id); 
         }
      }
        if (!accountIds.isEmpty()) { 
         for (Account acc : [SELECT Id, (SELECT Id, OwnerId FROM Contacts) FROM Account WHERE Id in :accountIds])
            {
            String newOwnerId = newOwnerIds.get(act.Id); 
            String oldOwnerId = oldOwnerIds.get(act.Id); 
            for (Contact c : acc.Contacts) 
            { 
               if (c.OwnerId == oldOwnerId) 
               {
               Contact updatedContact = new Contact(Id = c.Id, OwnerId = newOwnerId);
               contactUpdates.add(updatedContact);
               }
            }
            
            }
       }
            update contactUpdates;
}

 Pease help i need this asap...