How to Recover a Lost Inbox on Outlookby Jim Campbell
Your Outlook email inbox contains all your email and contacts used in the client software. If you accidentally delete the inbox or it corrupts, you must restore it from a backup. Create a backup to ensure that you do not lose data including email messages. Outlook has an import wizard that helps you recover a lost Outlook inbox and import your lost email messages and contact addresses.
Open Microsoft Outlook. Click the "File" menu item at the top of your window and select "Import and Export." This opens the import wizard.
Select "Import from another program or file" and click the "Next" button. Select "Personal Folder File (.pst)" and click "Next."
Select a directory to store your Outlook inbox. Select "Do not import duplicate items" and click the "Next" button. The inbox imports into your Outlook client. Click the "Finish" button at the final window to complete the settings.