Opening an OST file directly in Outlook can be difficult because OST files are linked to a specific Outlook profile. If you need to access its data,
eSoftTools OST to PST Converter Software can convert the OST file into PST format. The converted PST can then be opened in Outlook, allowing you to access emails, contacts, calendars, attachments, and other mailbox items easily.
Read More:- Open an OST file to Outlook