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"Our client has multiple departments, with each Department Head responsible for approving Purchase Orders for their respective department in Business Central.
At the point when a Purchase Order is submitted for approval, the VAT Prod. Posting Group is not yet known and is therefore left blank.
Once the Purchase Order has been approved and released, a member of the Finance team reviews the document and enters the appropriate VAT Prod. Posting Group before posting it. However, when they attempt to update this field, Business Central displays an error stating that the Purchase Document must first be reopened.
The client's requirement is for the Purchase Order to remain released while allowing the Finance team to amend only the VAT Prod. Posting Group and proceed with posting, without having to reopen the document.
While reviewing the Business Central workflow responses, I identified the "Apply the new values" response. I configured this response as shown below and added the VAT Prod. Posting Group field, but when the workflow is enabled the following error message is received "The workflow does not contain a response to revert and save the changed field values." Am I missing a workflow response after the Apply the new values ?
Based on the screenshot and the error message, this is not a matter of adding another response after Apply the new values. That response is intended for a field-change approval workflow where Business Central first reverts and stores the proposed field value, and later applies or discards it depending on the approval outcome.
A released Purchase Order is protected from this type of direct modification in standard Business Central. The expected process is to reopen the document, update the required field, and release it again.
Therefore, the clean standard solution is to change the approval process so that Finance enters or validates the VAT Prod. Posting Group before the final release. For example, the department manager approves the commercial content first, Finance completes the VAT setup, and only then is the Purchase Order finally released.
If th requirement is specifically to keep the document in Released status while allowing Finance to modify only the VAT Prod. Posting Group, then this requires an AL customization. The customization should be carefully designed because changing the VAT Product Posting Group can affect VAT calculation and posting setup.
Kind regards
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