I was wondering when/if the crown editor will be updated to allow you to edit it past 10 years?
To answer your initial question, I don’t know. But, to clarify something a lot don’t know when modifying their account, you run a high chance of getting banned for editing your Xbox LIVE tenure! It’s obviously still your choice in whether or not you want to modify your account, but I do advise you knowing the risk(s) behind doing so because there have been a lot of posts on here where people modify something, get banned/suspended, and they think people here are to blame.
Have a good one!