Family property settlement done leaving out 1 brother

After mutation of will father of your friend became absolute owner of the property bequeathed by his father (grandfather of your friend). He may give to his other siblings or not is not being questioned or a matter of dispute.

However, your friend can get his share from portion/ share of intestate property devolved in favour of his father 

You have made the facts bit confusing and vague, therefore, he should consult a local prudent lawyer with relevant documents.

The facts are confusing.  When your grandfather has willed his self acquired property to your friend's father how does your friend's father can enter a sham document of settling that property absolutely belonging to their brother.  Contact a local advocate and help your friend after providing the clarifications to him.

Thank you Dr J.C. Vasishta for your reply. I wish to ask if in such a case where the grandfather willed the land to the father, who then died intestate, can the mother (wife of father) settle the land in anyway she likes, without giving a portion to one of the sons ?

Thanks in advance...

Its a confusion, firstly you stated , after his parents demised, 2 brother made settlement and later you stated about mother can settle the land.  So after reading your second post, now mother and 03 sons are the legal heirs leaving behind after death of your friends father.  After his death, all four legal heirs now succeeded to the land .  This alleged settlement deed is illegal and not completed , valid in the absence of another heir who is in abroad and also mother. 

The settlement is not binding on the third brother. He ca file a suit for partition with the other two brothers as defendants, seeking partition of the property left intestate on the demise of father. It may be left to the defendants to plead and prove the alleged settlement deed.