The transition to Outlook is nearly complete across the system. Check out the O-365 Training Tips and Tricks group on Workplace for some helpful tips or to ask any questions you may have. You can also find available training dates on Guthrie Learn.
One quirk in Outlook that differs from Lotus Notes is how to block PTO. In Outlook, if you add PTO as an all-day or half day, be sure to select "Out of Office" under the "Show As:" dropdown box. This will ensure that others who access your calendar to schedule meetings will see that you are not available.