Hi Megan and welcome to the Disney Parks Moms Panel.
It is indeed possible to link tickets purchased from 2007 onwards in your
My Disney Experience account.
To do so, you need to complete the following steps once you have logged into your existing My Disney Experience Account:-
1/ Click on where it says "connect additional reservations, tickets or friends" which can be found underneath where it says "Welcome, Megan!"
2/ Click on "Get Started"
3/ When asked "Do you have another Disney Resort hotel reservation?" click No
4/ Click "Next"
5/ When it says "Here are your Family & Friends. Do you need to add anyone else?" click No
6/ Click "Next"
7/ When it says "Do you need to buy or link additional tickets?" click Yes
8/ Click "Link Tickets"
Please do note however that if the purchase date printed on your tickets is prior to 2007, you will need to call (407) 939-4357 for information on how you can use them.
Once successfully linked, the tickets will show up in the "My Reservations & Tickets" section on My Disney Experience. These tickets will be attributed to any MagicBands or Cards which are active. You can check to see which
MagicBands and Cards are active in the "MagicBands and Cards" section of My Disney Experience.
I, myself, managed to successfully link an old ticket which I had from back in 2012 with remaining admissions just a couple of months ago and it was a really straightforward process..
Wishing you a magical trip filled with memories which will last a lifetime!
Emma