Hello Javier,
The message you’re seeing is a BitLocker recovery prompt. That means the Surface Pro has BitLocker enabled, and Windows cannot continue until the recovery key is provided. The recovery key is tied to the Microsoft account or Azure AD account that originally set up the device. Since you don’t have access to the business accounts or the former employee’s credentials, there is no way to retrieve that recovery key. Microsoft does not provide a bypass method for BitLocker — this is by design to protect the data on the drive.
The only way forward is to completely wipe the device and reinstall Windows from scratch. On a Surface Pro 1796, you can do this by creating a bootable USB with the latest Windows 11 installation media. Download the Media Creation Tool from Microsoft on another PC, use it to create a bootable USB, then insert it into the Surface. Power off the Surface, hold the Volume Down button, and press Power to boot from USB. From there, delete all partitions during setup and perform a clean installation. This will remove the BitLocker protection and reset the device to factory state.
If you prefer the official Surface recovery image, you can go to Microsoft’s Surface Recovery Image download page, enter the device’s serial number (found on the kickstand), and download the correct image. Use that to create a recovery USB, boot from it, and perform the reset. That will restore the Surface to its original factory configuration.
Without the recovery key, you cannot unlock the existing installation, so the only viable solution is a clean reinstall. Once complete, the device will be yours to set up with a new account.
I hope you've found something useful here. If it helps you get more insight into the issue, it's appreciated to accept the answer. Should you have more questions, feel free to leave a message. Have a nice day!
HP.