How to reactivate DJI care refresh after its expired
To reactivate a care refresh plan once the original plan has expired, you will need to take a video showing the functionality of the product. The video guide can be found here:
https://terra-1-g.djicdn.com/b20074248eff4b7f957d0f1a5ab29253/care/DJI%20Care%20Enterprise%20Video%20Verification%20Tutorial.pdf
Once you have the video you will need to reach out to support@dji.com to reopen the activation window.
Also note that you can only renew a care refresh plan on a drone once, meaning that you can only activate a maximum of 2 care refresh codes per drone.