Hi,
As my title says i'm working in an AX 2012 R3 CU8 environment. I got a bit confused about the time reservations are made for sales and transfer orders.
I was practising in an Azure environment, and as far i had understood, it wasn't necessary to reserve items during the order processing because the reservation process can take place while releasing to warehouse.
I had read the following in WHS implementation guide (in the Location directives topic):

Also according to the implementation guide there is the option to "Reserve at release to warehouse" in the Warehouses form which was not available anymore (think this might have changed with CU8 and the guide applies to CU7, but not sure):

The new option available now is "Reserve when orders are released by a batch job".
So, according what i had read, i thought i could avoid doing manual or automatic reservations at order processing because it was done during the release to warehouse process.
I have tryed releasing orders from the three ways available: manually each one from the "Release to warehouse" button on the orders, the job from the warehouse management module in the periodic folder and also the "Release to warehouse form" in the common folder of the warehouse management module where i can add lines from different orders and then release them.
In my Azure environment i was able to release the orders from the three ways above mentioned without doing any manual or automatic reservations.
When i started working in a customer's environment i noticed that i wasn't able to release orders unless the items were previously reserved (manual or automatic).
I started to compare my setups on the Warehouses, Location directives, work templates but found nothing. No check box was checked on my warehouses form at any of both environments.
Up to now, i found out that i could check the "Reserve when orders are released by a batch job" and process the release job from the periodic folder and the reservations are done at that time (that's the same for both environments, Azure and my customers')
However, when i tryed to use the "Release to warehouse form" (the one in the common area, which i found very useful) i saw that the field "Quantity available to reserve" was 0 in both environments. Despite that, everytime i tryed to add the line to be released in my Azure environment, i was able and the reservation was made at that time (before releasing the lines add in the lower pane). But, when i tryed to do the same at my customer environment, i got a message telling me that the quantity needs to be reserved.
I hope someone could give me an explanation of this process clearly. I thought i had understood that but the different results i got at different environments made me think i'm missing something (maybe a parameter).
The release to warehouse form is the one which makes me hesitate, has anybody tryed this? Is there anyway to the reservation to be made after adding and releasing the lines?
I will appreciate any help, thanks for your time!