Unlocking MDM Locked iPhone

You can't Unlock without support from your organisation. Use MDM to manage Activation Lock and Lost Mode - Apple ...

Where did you get it?

Only the company it's locked to can remove that.

If you bought a used phone, odds are it's stolen. Return it and get your money back.

You can't unlock it as it is managed by your company. Better talk to your IT admin to unlock it.