As for Rooted devices, you need to grant permission from the Root permission management app.
NOTE: DO NOT USE one-click root management apps (ie. KingRoot, KingoRoot), otherwise it MAY RISK your device to turn brick or encounter unknown issues. (ie. your device will be recognized as Non-rooted.)
From our customers' experience, it is recommended to use Super SU or Magisk since these are relatively mature solutions online compared with one-click root management apps.
There are 2 WAYS to grant the root permission from the device:
Tips：after upgrading/re-installing, un-checked.
Go to AirDroid Business desktop client > select your rooted online devices (with a battery icon) > click on Remote Control.
Tips: If your rooted device is shown as Offline on AirDroid Business desktop client, please check if Biz Daemon is running on background AND check the internet connection of your rooted devices.
To keep Biz Daemon running on the background, please refers to Failed to connect to device?