I got this to work with the old Loop Around trick. I took a spare Analog Extension and looped it to a spare POTS Trunk port. You have to make sure the inhibit off switch forward/transfer is not checked. Change the outgoing ID of the trunk to something unique. Such as 5. Create a short code, something like 7N, Dial, N, 5 . Create your short codes to enable HG NS, and clear HG NS. Say the short code is *640, enable HG NS, 200, 0. Create a phantom user, unconditional forward the user to 7*640. Set your AA to have an action to transfer to that user. This was the only way I could figure it out from an Auto Attendant. Of course there is always the use of twinning with FNE Codes as well.
AJ