Thank you for your question and reaching out.
Exchange Native Data Protection :
Exchange Native Data Protection is a notion that Microsoft's preferred design for Exchange Server 2016 and Exchange Server 2019 makes use of. Exchange Native Data Protection uses built-in Exchange features rather than backups to safeguard your mailbox data, though you are still able to use those functions and create backups. When deployed and configured properly, a number of capabilities in Exchange 2016 and Exchange 2019 can offer native data protection, obviating the need for manual data backups.
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