In T131787#1737286, @BluWolve wrote:

Are you holding the A button, using the triggers to switch containers to one with a empty slot, then releasing A? The only time this hasn't worked for me is if the container I am trying to move an item to is registering as full. Sometimes the container is not actually full, but that is a separate issue.

In T131787#1737387, @Frostalicious wrote:

The feature doesn't work at all

https://forums.dayz.com/topic/238844-inventory-management-please-explain/
Maybe you don't have a slot to move it to?

In T131795#1737353, @BluWolve wrote:

The only reason this wouldnt work is if you are game sharing. You have to have your Xbox as your home Xbox. If you are game sharing you are breaking the terms of use of Xbox live and you cant expect technical support to be able to help you, sorry. Try making your Xbox your home Xbox, that might fix the issue.