Anchestral property for Christian daughters

Partition deed executed without Daughters(Christian) Hello sir , My Grandfather (father’s father) had ancestral property and partition deed was executed between my grandfather, father and my uncle in 1999 - Total property of 15 acres of agricultural land was divided into three parts among them. Family tree: My Grandfather had 4 kids (two daughters (my aunts) and two sons (my father and uncle)). we are based on Tamilnadu, and belongs to christian family. Now my Grandfather is no more (died on 2017) and property belonging to my grandfather is in possession of my father and my uncle (my uncle already sold 2 acre of land ). From google search i came to know , for Christian’s family ancestral property issues are coming under Indian succession act 1925 and daughter’s(my aunts ) have no right on ancestral property if the will is made by father(in this case my grandfather). My grandfather only made partition deed(without including my aunts). Will partition deed considered as will deed in this case? QUERY: 1.Does my aunts have the right on my grandfather/father/uncle property. 2. partition deed is valid ? Thanks in advance