Comments
This is a real issue when dealing with purchase orders with long lead-times that will have ETAs changed likely more than once due to external factors such as transshipment delays, conflicts impacting regular shipping routes, weather, etc. It shouldn't be a problem to be able to change dates and quantities simply because a Quality Order is still on open status, which by the way is generated once a Receipts List is created. Receipts List can be created well in advance depending on each business particular ways of working and, again, shouldn't be an impediment to enable PO dates to be changed.
All CRM (HubSpot, Dot Digital) has Send Time Optimization as standard feature. This not being available on Dynamics 365 Customer Insights Journey is embarrassing to say the least. Please include it at the earliest possible opportunity. At least provide the roadmap and dates for this feature to be available.