Outlook folders panel shows various standard and custom user folders. All folders such as Inbox, Outbox, Sent Items, Drafts and the customs can be sorted alphabetically. If the Show All Folders A to Z feature is enabled, the folders will be sorted according to the alphabetical order. Once this feature is disabled, the order is being reset to the defaults.
Show All folders A to Z works with Kerio Outlook Connector (Offline Edition), so-called KOFF profile.
KOFF stores the user folder settings on Kerio Connect server-side. As folders ordering is a client-based setting, the sorting is not propagated to other email clients, such as Webmail or Kerio Connect Client (Windows, macOS).
The Outlook Show All Folders A to Z feature allows to display folders based on their names.
When enabled, the Outlook sorts the folders alphabetically with an exception for standard INBOX, Drafts, Sent Items and Deleted Items (Trash) folders. They are being displayed at the top of the folders list.
If you're willing to re-arrange the folder order, you can also use the drag-drop feature. The Show All Folders A to Z needs to be disabled in this case. Then you will be able to move the necessary folder in the appropriate order, i.e. place INBOX near the bottom.
For more information, please refer to the Microsoft guide about Reordering your folders.