There is an error info log message appears when you try to modify Sales Order Price for example, and this sales order is linked to a Purchase Order and this PO is invoiced. This case on Microsoft Dynamics AX 2009.
The following infolog message will popup when you try to modify in the sales order “Safety level on the attached intercompany order(s) prevents modification of this order”
In order to overcome ths issue you have to change the AP-parameter, the safty level of invoice order, change it from Lock to None, or warning.
User Group: DynamicsArabia