Normally OST file cannot be opened directly in Outlook because OST file is linked to Exchange profile. If the profile is deleted or the server is unavailable, then OST becomes inaccessible. In such case OST file can be easily opened by using eSoftTools OST to PST Converter Software. This tool reads the data of OST file and converts it to PST format, which can be easily imported and opened in Outlook. Software safely recovers emails, contacts, calendars and attachments without affecting the folder structure or data quality.

Read More:- Open an OST file to Outlook