Keep provision after wake up from system off nrf52840

[S98VN]

I'm using sdk for mesh version 5.0.0, sdk version 17.0.2 and my board is nrf52840-DK.

How can i keep mesh config after wake up from deep sleep( system off).Plus, when my board loss power, it unprovion with mesh network. 

[Akbar]

Hey,

Can you please share, how did you achieve the deep sleep and then how did you wake it up ? i.e. did you used RTC or any other timer based logic ?  

Thank you !