My MAIL tile stopped working and  updating my messages so I Uninstalled that App and now I want to re-install to see if it will work properly again.  Problem is I don't see'' Mail ''in the Apps list to be able to re-pin to START menu....

It was convenient having the MAIL tile on start as it saves me opening up Desktop>Outlook>sign in to Inbox...

How can I put these Apps back on Start?