Before you can use any paid tool, you should try manual method to recover corrupted mailbox data from Outlook.com account. In which user doesn't require any third-party tool or pay any other cost. To perform the manual method you just required to adjust some setting,

Also for instant recovery of Outlook.com mailbox data I would like to suggest Outlook.com backup software. It allows you to perform incremental backup of Outlook.com data. With this application you can easily backup all mailbox data without any loss in meta properties. Software also allows you to save backup data into Local PC.