My experience so far (not arriving until Aug 22): Purchased CDN ticket offer through disneyland.com back in the beginning of the year. Was sent an email with a link to the e-Tickets. It also showed up on my
disneyland app account (all 4 tickets.) At that time, it wasn't possible to link tickets to the app on anyone else account, just annual passports.) Now (post July 14 App update, you can link any E-ticket to the app so that you can even create a Fastpass Party and eventually be able to purchase Maxpass once all the tickets have been scanned to go into the park. Disneyland Ticketing Email said to show the E-ticket at the turnstiles (with your Canadian Passport) where it will be scanned and you will be given a paper version of the ticket also. Once you're in the park, you can purchase Maxpass if so desired and book fastpasses with the app.
And yes, my app shows a ticket expiry 14 days from current date.