Hi Steve and friends,
While you can wait for Microsoft to add the field to the Inventory Setup page, you don't need to. You can add it to the page today by going to the Sandbox, and then using Settings (the gear icon) and clicking on Designer while on the Inventory Setup page.
Here, you will find the option to add fields (+Field), and in the field list that appears to your right, you will find the Automatic Cost Posting option.
Note: You have to be in the Sandbox > Designer; this field is not visible from the Personalize option.
After adding the field, click Stop Designing, save it as an Extension and be sure click the box that allows you to download it. The zip file that you download must be opened in Visual Studio Code (make sure to have the AL extension installed), you must download symbols, and then compile it to get the .app package. Sounds like a lot of steps, but once you have Visual Studio Code and AL installed, and you've done this a couple times, it just takes a few minutes.
The .app file can be uploaded from the Extensions page in your production environment; it will validate in a few minutes and then be available to use.
The code behind this field is already in place - it was just the field that was left off the setup page by default.
I hope this helps. If my response has answered your question, please verify by clicking Yes next to "Did this answer your question?"
