Hello Mostafa.
I am on Win 10 using Mail Version 16005.14326.21798.0
I do not find an Accounts tab per se. I have two Accounts on the left pane. I have Account settings under settings. I don't find any Export function, though, anywhere.
On option two, I have hidden and system files showing, but there is no Windows Mail folder anywhere under Appdata or child folders.
What i am wanting to do is capture the email addresses collected in Mail to save in a spreadsheet.
I don't find a File menu to display Options. Is there a paid version of Mail that has these things? I only have what came with Windows.