Help With Outlook 365 email

To restore all of your deleted emails from Outlook 365, even if you have unchecked the ones you wanted to save from the deleted file, you can use the following steps:

1. Open Outlook.
2. In the left pane, select the Deleted Items folder.
3. At the top of the message list, select Recover items deleted from this folder.
4. In the Recover Deleted Items dialog box, select the Recover all items checkbox.
5. Click OK.

Recover deleted items in Outlook for Windows - Microsoft Support

Outlook will restore all of your deleted emails to the Deleted Items folder, including the ones that you unchecked. You can then move them back to your Inbox or other folders as needed.

If you have a lot of deleted emails, it may take some time for Outlook to restore them all. You can continue to use Outlook while the restore is in progress.