How to set time zone & meeting hours in Outlook
Step 1 - Open Outlook in a browser.
Step 2 - Click on the Gear icon displayed in the top right of the screen.
Step 3 - Select Calendar and then View. Ensure (UTC -05:00) Eastern Time (US & Canada) is selected as the time zone shown below. Once that has been selected, please click Yes, Update to ensure your meeting hours match your time zone. If this option doesn't appear, no further action is needed.
Step 4 - Click