the user exit on the sap post the account document
I use the t-code mb01 or migo to receipt goods for purchase order.When I execute post or save,the sap generate the material document and the account document.The account documents have two item with account 12110000 and account 12010000.And I know this two account was configure in the t-code omwb.
Now my company have a new requirement:
When the sap generate the account documents,I need to write some code to do some judgement and change the account 12110000 to account 35510000 or other account.The logic of the code was complex and it's impossible to do in sap standard configure.So I want to find the user exit on the sap post the account document.In the user exit I would write some code to do some judgement and change the account 12110000 to account 35510000 or other account.
But I can't found the user exit.So I need the experts to give me some reference.