I want to prevent AP staff from making changes to an invoice (GL code, number, description, etc) once that invoice has been posted into the GL module.  Otherwise, the information in AP doesn't mirror the GL.  

I don't want to prevent AP from editing an invoice prior to posting.  There are times when our AP specialists are in the middle of entering an invoice and save in order to edit later (they may go to lunch or are asked by AP Manager to exit in order to run checks)

Attached is a sample issue.

Blackbaud - Pre...

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