Name transfer and property division

My grandmother has died 1 year back with a will where she has divided property among 3 child out of 7 children but nowhere it is mentioned why she is not willing to give share to others. Have consulted a lawyer he is telling that every child should give a noc in order to validate that will or else court will ask everyone to present in court and ask their willingness whether to take share in property or not. Kindly suggest how to go forward. We want to transfer the ownership either 3 ways or 7 ways. But need to have a solution.