If meeting invitations are being accepted before you review them, Copilot may be following a saved Calendar instruction. These cloud-based instructions can accept invitations from chosen people or with matching subjects when your calendar is free. Removing the relevant instruction stops Copilot from applying it to future requests; it does not undo responses already sent.
The quickest fix is to open Settings > Copilot > Calendar instructions in new Outlook or Outlook on the web, locate the auto-accept instruction, and delete it. If you cannot see that page, use Copilot to review your saved instructions instead.
Find the rule that is answering for you
Calendar Instructions are more specific than a single on/off switch. You might have a rule such as “Always accept meetings from my manager if my calendar is free,” while invitations from everyone else still wait for a manual response. Read the people, subject, and availability conditions before deleting anything so you do not remove a useful decline, follow, or cleanup rule.
Delete the instruction from Outlook settings
Use new Outlook for Windows or Outlook on the web for the clearest path:
- Select the Settings gear in Outlook.
- Open Copilot, then select Calendar instructions.
- Find the instruction containing an accept meetings action.
- Open that instruction and choose Delete. If you still want some automation, edit its sender, subject, or availability condition instead.
- Confirm the change when Copilot asks you to review it.
The instruction works in the cloud, so closing desktop Outlook does not pause it. Deleting or narrowing the saved rule is the important step. If your goal is to keep Copilot’s scheduling help without automatic replies, you can still use it when you want assistance finding a suitable time; those scheduling suggestions do not require an always-accept instruction.
Ask Copilot to remove the rule
You can also open Copilot in new Outlook or the Microsoft 365 Copilot app and ask it to show your Calendar instructions. Then request that it delete the instruction that automatically accepts meeting invitations. Review the rule Copilot identifies before approving the deletion, especially if you have several instructions for different organizers or subjects.
Avoid a vague command such as “stop managing my calendar” when you only want to stop acceptance. A targeted request helps preserve unrelated instructions that remove canceled meetings, follow selected events, or decline low-priority invitations.
Confirm that automatic acceptance has stopped
Open Copilot and review its recent calendar actions. Microsoft says this activity view can show accepted, declined, followed, and removed meetings. Check the most recent automatic acceptance and note which instruction was responsible; this is useful when similarly worded rules overlap.
Next, send a test invitation from an account that matched the old condition. Use a future time when the calendar is free, because an availability condition may hide the problem during a busy slot. The request should remain unanswered until you choose Accept, Tentative, or Decline.
Previously accepted meetings stay on the calendar. Open any meeting that should not be accepted, change your response manually, and send the update if Outlook offers that choice. Removing the instruction changes future processing rather than rewriting past responses.
If invitations are still being accepted
Another calendar mechanism may be responding even after the Copilot instruction is gone. Work through the source of the response instead of repeatedly deleting and recreating the Outlook profile.
Check whether a delegate is responding
A delegate can receive and answer meeting requests on your behalf. In Outlook on the web, open Calendar sharing and permissions and inspect the Delegates section. In classic Outlook, go to File > Account Settings > Delegate Access.
Ask the delegate whether they are processing the invitation, and review whether requests go to the delegate only, to the delegate with a copy to you, or to both of you. This distinction matters because the calendar entry can look automatic even though another person sent the response. Our permissions overview explains whether another person can answer using your calendar when you need to retain shared access without handing over every RSVP.
Separate acceptance from tentative placement
Outlook can place new meeting requests on a calendar as Tentative without sending a reply to the organizer. That is not an acceptance. Open the item or the original invitation and check the response status before assuming Copilot acted.
If the organizer received an acceptance but you find no Copilot action, ask your Microsoft 365 administrator to check mailbox-side processing, inbox rules, or connected automation. Room and equipment mailboxes commonly use Exchange automatic booking, but that configuration is controlled by an administrator rather than by a user’s Copilot instruction.
Separate automatic rescheduling from automatic replies
Copilot can also reschedule eligible personal appointments and one-to-one meetings when conflicts appear. That per-event option is separate from Calendar Instructions. Open the affected event and turn off If conflicts arise, let Copilot reschedule this event if the problem is an unexpected time change rather than an RSVP.
Questions you might have
Does deleting a Calendar instruction decline meetings already accepted?
No. The deletion controls what Copilot does with future invitations. Open an already accepted meeting and change your response manually if you no longer plan to attend; Outlook may send the organizer an updated response.
Why can I not see Calendar instructions in classic Outlook?
Microsoft documents Calendar Instructions for new Outlook for Windows and Outlook on the web, with management also available through the Microsoft 365 Copilot app. Switch to one of those experiences and confirm that you are signed in with the same work or school account that received the invitations.
Can I keep one automatic acceptance rule and remove another?
Yes. Instructions can target people, subject text, and calendar availability. Delete only the broad or unwanted rule, or edit its conditions so important invitations can still be handled while other requests wait for your decision.
What if Copilot shows no matching recent action?
That points away from Calendar Instructions. Check delegates, connected workflows, and whether the item was merely added as Tentative. For a shared or resource mailbox, ask an Exchange administrator to inspect its calendar-processing configuration because end users may not be able to change it.
Take back manual control without losing Copilot
Remove the specific auto-accept instruction, confirm the change in recent actions, and test with an invitation that previously matched the rule. Keep scheduling suggestions and other focused instructions if they still save time. If a reply continues after the Copilot rule is gone, the evidence from the meeting status and organizer response will help you identify a delegate, mailbox policy, or separate automation instead of blaming the wrong feature.