Is the "safest" thing to do is allow the users to check and rebase their delta apps manually?

Q: It sounds like, based on recommendations, is that the "safest" thing to do is allow the users to check and rebase their delta apps manually?
A: That is one of the available options that some customers are choosing. A good communication to all users is recommended before and after their OS is patched. You would want users to manually rebase their delta calendar items as soon as the OS is patched to avoid a mix of items created under 2006 and 2007 DST rules.