Hi! I am using a Microsoft Surface Book 2 and I have enabled the Require additional authentication at startup on the local policy for Bitlocker drive Encryption on OS drive. When i tried to turn on Bitlocker for the OS drive, it gave me only two options to unlock the drive at startup: either to insert a USB flash drive or Let Bitlocker automatically unlock my drive. It didn’t give me the option to Enter a PIN . Can anyone help me with this issue?