Managing personal Outlook.com account settings, security, and privacy
Since this happened only about 12 hours ago, there is a good chance that the missing items may still be recoverable. Outlook.com keeps items removed from the Deleted Items folder in the Recoverable Items area for up to 30 days. This can include email messages as well as calendar items.
Please use Outlook on the web from a PC or Mac and try the following:
- Open Deleted Items.
- At the top of the message list, select Recover items deleted from this folder.
- Look for the missing message. You can search the list by subject/sender if necessary.
- Select the checkbox next to the item.
- Click Restore.
If the missing item is actually a calendar appointment, restoring it should return it to the Calendar. Email messages are restored to their original mail folder when possible