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You can't remove a calendar item or an email message in Outlook in Office 365
Article ID: 2503266 - View products that this article applies to.
Not sure what release of Office 365 you're using? Go to the following Microsoft website:
Am I using Office 365 after the service upgrade?
When you try to remove a calendar item like a meeting request, a reminder, or an email message in Microsoft Outlook in Microsoft Office 365, you can't remove it. Additionally, if you try to remove a meeting request, you may receive an error message like the following:
This meeting cannot be removed because you are the meeting organizer.
To fix this issue, use one or more of the following methods. Try Method 1 first. If that doesn't fix the issue, try the next method.
Method 1: Delete the meeting by using Outlook Web AppTry to delete the item in Outlook Web App. If you can't delete it in Outlook Web App, go to the next method.
Note If you can't complete a task in Outlook, but you can complete it in Outlook Web App, it sometimes means that Outlook has to be updated.
Method 2: Delete the message by running Outlook commandsDepending on the kind of item that you're trying to remove, you can use the following command line switches to remove the item. Before you run any of these switches, exit Outlook.
Method 3: Delete the message after you edit it
Method 4: Empty the Deleted Items folderIn Outlook, delete all items that are in the Deleted Items folder, and then try to delete the meeting request or message.
Method 5: Delete the meeting reminders by using the MFCMAPI editorThese steps help you remove a meeting reminder that still appears even though the original meeting was removed. This typically occurs if the meeting reminder is corrupted.
Note Although the MFCMAPI editor is supported by Exchange Online, use caution when you make changes to mailboxes by using this tool. Using the MFCMAPI editor incorrectly can cause permanent damage to a mailbox.
Note The exact steps may vary, depending on the version of MFCMAPI that you're using.
Still need help? Go to the Office 365 Community
Article ID: 2503266 - Last Review: May 15, 2013 - Revision: 24.0