Due to improper closing of Outlook data files, this happens many times when the mails in the 'Inbox' folder are inaccessible. Therefore you would not be able to read and reply important mails. Also, the default Outlook PST Repair Tool is unable to fix that issue! Now what to do?
Most people will panic in such a situation, but the ideal deal is to move forward and install the Phoenix Outlook PST Repair Tool from Stellar.