I have an update for everyone! I verified that that dealer-installed updates of MyFord Touch/MyLincoln Touch are covered under warranty once per update. For example, if you started off with version 2.4 and went to the dealer and your system was updated to 2.6, since we are now at 2.8, you would be able to take it in again for the current version. This includes any future dealer-installed updates covered under warranty. The key is, if you already received the update to 2.8 and try to have a different dealer install 2.8 again, this will not be covered under warranty.
As always, if you have any concerns, please feel free to call the SYNC Support team (800-392-3673 - Option 1 then 3) for troubleshooting. I hope this helps!
Cory