Legacy BIOS conflict with Group Policy?

Good morning,

If my machine is running on a legacy BIOS (It has to be, because of certain reason), but the domain that my company is enforcing group policy such as:

Enable LSASS run as a protected process: Enabled with UEFI Lock.

What would happen if my machine joined the domain? What will be the impact if this policy is enforced on my computer. Will my computer crash or not boot successfully?

Thank you very much.