You/your friend, have no chance of getting an NOC from your/his employer since you/he has been hired and have worked under their sponsorship for a month.

Of-course, you/he can terminate the contract by giving a resignation letter as you/he is still under probation period. But remember, you/he; is already under their sponsorship and it is
their discretion whether to release you/he under the circumstances..

I i strongly believe, there is a "NIL CHANCE"