Outlook OST files (Offline Storage Table) are designed for cached Exchange, Microsoft 365, and IMAP accounts. They let you work offline and sync later—but they can become a problem when you need to move data to a new PC, migrate mailboxes, recover emails from a crashed profile, or switch to a different Outlook setup. That’s where an OST-to-PST tool becomes essential. PST (Personal Sto... https://hallbook.com.br/blogs/899259/How-to-Choose-the-Best-OST-to-PST-Tool-for