Thanks for quick rely. After trying the above XSL, i am getting additional <PObject_Customers_Body>
<?xml version="1.0" encoding="utf-8"?>
<acc:PObject_Customer xmlns:acc="http://accNamespace.com" xmlns:n0="http://www.XXXX.com/">
<acc:PObject_Customers_Body>
<PObject_Customers_Body>
<Header>
<ID>4949494</ID>
<Timestamp>2015-02-09 08:00:01</Timestamp>
<MessageID>CAB690C8-A934-4E71-966E-A573BE7EEBF1</MessageID>
<Sender>SAP</Sender>
<Function>Update</Function>
</Header>
<Body>
<Customer>moreData</Customer>
</Body>
</PObject_Customers_Body>
</acc:PObject_Customers_Body>
</acc:PObject_Customer>
Also my output has to be <acc:PObject_Customer> and remove all the xmlns:acc="http://accNamespace.com" xmlns:n0="http://www.XXXX.com/">
Can you advice & thanks for your time!