Hi JMMPW ,
There is a basic "Authorisation" feature for purchase orders in MYOB Exo Business that might meet your requirements, there'ssome brief notes on it here:
https://help.myob.com.au/exo/help/exo2021//desktop/Purchase_Order_Authorisation.htm
And it is mentioned here:
https://help.myob.com.au/exo/help/exo2021//desktop/Argon_EXO_Help/The_Procurement_Cycle/Purchase_Orders.htm
I suspect the feature doesn't allow the depth you're asking for out of the box, if you get in touch with your implementing partner they might be able to set up custom logic to enable what you need using a combination of the Purchase Order Authorisation feature, and Business Alerts to trigger the required emails.
