Edge Sums Sudoku (Daily Sudoku League #147)

For today, I was having two puzzles to choose from one of which I am posting now i.e. Edge Sums Sudoku and another is Product Arrow Sudoku. Earlier I wanted to post Product Arrow Sudoku but I was not having a solution ready for that puzzle. So I will post that puzzle later.

Edge Sums Sudoku appeared in the 10th World Sudoku Championship 2015. While creating this puzzle I learned few things e.g. in-out way to solving needs to be carefully used when there is a scattered area which is having the same number used more than once in scattered cells.

This Edge Sums Sudoku, I am posting in The League of Extraordinary Ladies & Gentlemen as 147th Sudoku in this series. Can you solve this Sudoku puzzle?

Rules of Edge Sums Sudoku

Place the digits from 1 to 7 in every row, column, bold outlined area, and twice in the grey cells. The clues outside the grid are the sum of the first two digits seen from that side.