Mobile clients must be reconfigured as part of the migration. Instructions for different phone platforms are found below.
Keep in mind that if you have configured your account in the devices native app as well as the Outlook app, both will need to be reconfigured.
Some Microsoft apps may use a shared token. If you have issues where you're seeing your mobile apps continue to point to the megatenant even after logging out and logging back in, make sure to sign out of all of your Microsoft apps on your phone. Once you've signed out, reboot your phone. After rebooting, sign into your apps and confirm that you are connected to the new tenant with your @fortthomas.kyschools.us address and can see the new tenant.