OST Conversion on macOS
OST files are designed to function only in a synchronized environment with the Exchange server. If the synchronization chain breaks, Outlook treats the OST file as orphaned and restricts access. PST files, on the other hand, are standalone data files that store emails, contacts, calendars, tasks, notes, and journals locally. Converting OST to PST allows users to regain full control over their mailbox data, making it portable, accessible, and reusable across different Outlook accounts and systems.
This conversion is particularly important during scenarios such as Exchange migration, Office 365 tenant changes, employee exit management, legal investigations, or email archiving. Without converting OST to PST, recovering data from damaged or inaccessible OST files would be nearly impossible through manual methods.
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https://apps.microsoft.com/detail/9p62fq9z8x7p?hl=en-GB&gl=IN