MIRO User exit
We have a functional requirement as when in MIRO, if user changes G/L account to a balance sheet account, then this should give out a information message during the Invoice processing.
Could you let us know what exit can we use ?
Did you try using the exit EXIT_SAPLMRMP_010 (Customer Exit: Analyze Document Header and Item Data)
This customer-defined function module enables you to perform various analyses. The invoice document header, including the tax table, and the invoice document items are available.
Kindly let us know by posting a reply if this works for you.