In this activity, you determine under which circumstances fields within posted documents can be changed.
For a number of fields, the system itself determines that they can no longer be changed after posting. This includes all fields which are central to the principles of orderly accounting, for example, the amount posted and the account.
The system also prevents the update objects from being changed in documents which have already been posted, independent of the document change rules. Update objects are elements in the system for which transaction figures or line items are updated, for example, business area or cost centers (if cost center accounting is used in the SAP system). Update objects are entered as additional account assignments during posting.
If you are using the Special Purpose Ledger application, you should ensure that fields which are updated there are protected against changes in the document. Document changes do not affect updating in the special purpose ledger.