How to Use Copilot in Outlook to Reschedule a Meeting Across Time Zones

You have a meeting scheduled with participants in multiple time zones and need to move it to a slot that works for everyone. Manually checking each attendee’s local time and finding a common free window can take several minutes and often leads to errors. Copilot in Outlook can analyze the calendar availability of all participants and suggest new meeting times that respect their working hours across different time zones. This article explains how to use Copilot to reschedule a meeting efficiently, what prerequisites are required, and how to avoid common mistakes when the feature behaves unexpectedly.

How Copilot Reschedules Meetings with Time Zone Awareness

Copilot in Outlook uses calendar data from Microsoft Graph to evaluate the availability of all meeting participants. When you ask Copilot to reschedule a meeting, it reads the current meeting details, including the original time and attendee list. It then compares each attendee’s free/busy calendar entries and their configured working hours. For attendees in different time zones, Copilot converts the proposed new time into their local time zone and checks whether the slot falls within their working day. The feature does not move the meeting automatically. Instead, it presents a list of suggested time slots. You select one, and Copilot updates the meeting request with the new time and sends an update to all attendees. The time zone conversion is based on the time zone setting in each attendee’s Outlook profile, not the organizer’s time zone.

Before using this feature, ensure you have a Copilot for Microsoft 365 license assigned to your account. The Copilot pane in Outlook is available in the new Outlook for Windows, Outlook on the web, and Outlook for Mac. Classic Outlook for Windows does not support the Copilot pane for rescheduling. You also need an active internet connection because Copilot queries Microsoft Graph in real time.

Steps to Reschedule a Meeting Using Copilot in Outlook

1. Open the meeting in Outlook
   Double-click the existing meeting in your calendar to open it in its own window. Do not use the reading pane preview because the Copilot Reschedule button is not available there.
2. Click the Copilot icon in the toolbar
   On the meeting window toolbar, locate the Copilot icon. It looks like a small purple or blue sparkle. Click it to open the Copilot side pane.
3. Select Reschedule with Copilot
   In the Copilot pane, you see several suggested actions. Click Reschedule with Copilot. If this button is not visible, type a prompt such as Reschedule this meeting to next Tuesday at a time that works for all attendees in US Eastern and UK time.
4. Describe the new time preference
   In the text box at the bottom of the Copilot pane, type your request. Be specific about the new date or date range and the time zones involved. For example: Move this meeting to next Monday or Tuesday between 9 AM and 12 PM Eastern Time. Attendees are in New York, London, and Sydney. Press Enter to send the prompt.
5. Review the suggested time slots
   Copilot analyzes the calendars and displays a list of suggested time slots. Each suggestion shows the proposed time in your local time zone and the corresponding local time for each attendee. The suggestion also indicates whether the slot is inside or outside each attendee’s working hours.
6. Select a time slot and confirm
   Click the time slot you prefer. Copilot automatically updates the meeting start and end time in the meeting window. Review the time zone display to ensure it matches your intent. Click Send Update to notify all attendees of the new time.

When Copilot Fails to Suggest a Suitable Time

Copilot shows no suggestions at all

This usually happens when Copilot cannot find any overlap between the attendees’ availability and your requested time window. Widen the date range or adjust the time window in your prompt. For example, change Monday only to Monday through Wednesday. Also check that all attendees have published their calendar free/busy information to your organization. External attendees without calendar sharing appear as Unknown and may block suggestions.

Copilot suggests times outside working hours for some attendees

Copilot respects the working hours set in each attendee’s Outlook Calendar settings. If an attendee has not configured working hours, Copilot defaults to 8 AM to 5 PM in their local time zone. Ask attendees to verify their working hours in Outlook > File > Options > Calendar > Working hours. If an attendee works nontraditional hours, they should update their settings so Copilot can avoid off-hours suggestions.

Copilot shows the wrong time zone in the suggestion

The time zone displayed in the suggestion is the time zone of your Outlook profile, not the meeting organizer’s original time zone. To change your display time zone, go to Outlook > File > Options > Calendar > Time zones. Changing your display time zone does not affect the meeting time for other attendees. Each attendee sees the meeting time converted to their own time zone when they receive the update.

How to Prompt Copilot for Better Results

The quality of Copilot’s suggestions depends on how clearly you describe the constraints. Use these prompt patterns for better results:

• Include the date range: Reschedule this meeting to any day next week.
• Specify the time window in one reference time zone: Find a slot between 10 AM and 2 PM Pacific Time.
• List the time zones of key attendees: Attendees are in Pacific, Central, and Eastern European time zones.
• State a preference for duration: Keep the meeting at 60 minutes.
• Avoid ambiguous phrases: Do not use morning or afternoon without specifying a time zone. Write morning Eastern Time instead.

Copilot Reschedule vs Manual Reschedule: Key Differences

Item	Copilot Reschedule	Manual Reschedule
Time zone handling	Automatic conversion for all attendees based on their Outlook profile time zone	You must manually convert each attendee’s local time and check for conflicts
Availability check	Queries Microsoft Graph for free/busy data of all attendees	You use Scheduling Assistant to see free/busy grids and interpret them manually
Working hours respect	Automatically avoids times outside each attendee’s configured working hours	You must visually inspect each attendee’s schedule for off-hours slots
Suggested slots	Copilot presents a list of up to 5 best-fit time slots	No suggestions are generated; you drag the meeting to a free slot yourself
Update process	One click on a suggestion updates the meeting and sends notifications	You manually change the time, then click Send Update

Limitations and Things to Avoid

Copilot does not reschedule recurring meetings. If you try to use Reschedule with Copilot on a recurring series, the button is grayed out. You must open a single occurrence of the series or create a new meeting. Copilot also cannot read calendar data for attendees outside your organization unless they have granted explicit sharing permissions. For external attendees, Copilot treats their availability as unknown and may still suggest slots that conflict with their calendar. Always verify with external attendees before sending the update.

Do not rely on Copilot to handle meetings with more than 20 attendees. Performance degrades, and suggestions may take longer than 30 seconds to appear. For large meetings, use the Scheduling Assistant in Outlook instead. Also avoid using vague prompts like find a better time without specifying constraints. Copilot needs concrete parameters to generate useful suggestions.

Conclusion

You can now use Copilot in Outlook to reschedule a meeting across time zones without manually converting times or checking each attendee’s calendar. Open the meeting, click the Copilot icon, select Reschedule with Copilot, and describe your preferred date range and time window. Copilot suggests conflict-free slots that respect each attendee’s working hours. For best results, include the reference time zone and the time zones of key attendees in your prompt. If Copilot cannot find a suitable slot, widen the date range or verify that all attendees have published their calendar free/busy data. As a next step, try using Copilot to draft the meeting update message explaining the time change to attendees.