It seems that you are experiencing an issue where all your messages, flagged items, and pinned items have disappeared from your inbox, and you can only see new incoming messages. This could be due to a filter applied to your inbox view settings, which may be hiding the items from view.
To resolve this issue, you can try the following steps:
- In Outlook, go to the View tab in the ribbon.
- In the Current View area, select View Settings.
- Click on Filter and review the filtering options to ensure that no filters are hiding your messages. Check options like date received, keywords, read/unread status, sender/recipient, importance, and size.
- Adjust or clear any filters that may be applied.
After making these changes, check your inbox again to see if the missing items reappear.