Office 365 (Outlook 2016) - Updating a Calendar event using drag-and-drop
Need to change the date or time of a calendar event?
Whether you are using the Outlook client or the Outlook on the Weblication, just drag the event to the new time or date and drop it! Meetings moved in this manner will prompt you to send notice of the change to the participants.
Choose the meeting you would like to move.
Drag the meeting to the new time/date. A prompt to send the update to the invitees will appear. Choose to 'save changes and send update' and click OK.
The meeting will appear at the new date and time on the calendar, with all invitees notified of the change.
If you have any questions or issues, please contact the CTS Help Desk.