Xbox power brick stays white when Xbox is off, while in Power Saver mode

when you turn off it will stay powered for a bit to complete syncing save and such, also to check and download updates, once complete it will then go off fully.

how long have you waited to see if it goes fully off.

The Xbox One has 2 power modes. The first is "Instant-On" mode in which the console is in a low power state in order to update in the background and boot-up in less than 10 seconds when you turn it on(Power Brick light is white when off)). The second option
is "Energy-Saver" and this results in the console turning completely off when you power it down. In this mode, the console does not update itself while off and it takes about a minute to boot-up the system when turned on (Power Brick light is orange when off).

Wow, surprised u didn't get it yet. You could try turning off in power saver mode, give it a minute, then start up and power down again with instant on. I've had mine on power saver and just powered on then shut down on instant on. It downloaded while off.
U can tell by the white power light on the power brick. It then started my xbox1 for about a minute then powered down. When I powered on again update starts. Good luck.

[quote user="Merlin4421"]

If you put it on energy saver power setting it turns orange when powered off. Instant on it stays white because it's not completely powered down.

[/quote]

This is 100% correct, I have my console on power saving and the brick light is orange, on the other setting it's white.

I put it on Energy Saver. I am fairly certain that I never turned the power off when the brick was powered on white.