Badi to save text after the object id gets generated while creating a order

Hi Experts,

My requirement is:

In crm order, after the order number gets generated, I want to default/save the order number in the header note text.

For this, I was trying CHANGE_BEFORE_UPDATE method in the ORDER_SAVE badi. In this method, though I get the order number(object id) but if I use CRM_MAINTAIN_TEXT_OW it does not save the text and display it in the transaction.

If I use CRM_ORDER_SAVE after CRM_ORDER_MAINTAIN, it throws a dump.

Please let me know which badi/event I can use to save the text after the order number gets generated.

Thanks in advance,

Sangeeta.