Changing the meeting time in Outlook is not reflected in Zoom schedule

This comes down to the integration between Zoom and outlook. Zoom provides an API but its up to third parties to build a robust integration. In Outlook's case is syncs to Zoom upon meeting create but not for meeting update or meeting delete. There is a Zoom marketplace app, Salepager, for scheduling Zoom meetings that syncs with Outlook and updates/ cancels events in Zoom when you make changes.