Acumatica needs the ability to warn or prevented a user from editing a sales order if another user is also currently modifying the same order. In most other non-SQL ERP systems, if a user opens a sales order, another cannot access the same order, they would receive a warning that the order is 'in use' where only 'view' functionality is permitted.
There might be some reasonable work around if record locking is not feasible. Perhaps adding a step to the automation flow that would check a box to create a visual flag that the order is in the process of being edited. Or a button that the first user would click to flag the record is in ‘edit mode’ which the second user would see before changing any fields.
This could be a deal-breaker for those moving from a traditional ERP system.