Hello Carla, and welcome to planDisney!
You are able to upgrade a
Magic Key pass if that pass that you desire to upgrade to is available. The Enchant Key is currently not available to purchase, but yes, in the future, if the Enchant Key does become available, you are able to upgrade your pass at an on-property ticket booth. The in-person ticket booths are located in the Esplanade accessible from the
Downtown Disney District near the entrances to both theme parks.
Since the
Magic Key passes have very high demand, I recommend that as soon as you see the Enchant Key available for purchase again to head over to the "
Happiest Place on Earth" as soon as possible to upgrade your Magic Key!
I hope this information was helpful for you Carla, and don't hesitate to bring any other questions back to planDisney!
Have a magical day!
Melissa