I updated my OS and then use the Outlook tool on my mailbox, and then someone with a non-updated machine sends me a recurring appointment. Will the time be off by an hour?

Q: I updated my OS and then use the Outlook tool on my mailbox, and then someone with a non-updated machine sends me a recurring appointment. Will the time be off by an hour?  Do i need to rebase again?
A: Yes it will be off by an hour, but no you don't need to rebase again. When the other person’s mailbox is rebased you will get a meeting update.