Backup of Exchange mailboxes on regular bases is crucial for maintaining the integrity, security, and recoverability of your email data. Some other important reasons make a backup of mailboxes crucial:

Data Loss Protection: Exchange mailbox backups serve as a safeguard against accidental or intentional data loss. Backup provides users with a reliable copy of their email data that is capable to restore in case of corruption, accidental deletion, hardware failure, or other data loss.

Quick Data Recovery: Multiple tools like Shoviv Exchange Server Backup provide fast and effective data recovery options you can restore individual mailboxes' specific folders or even individual emails from the backup without affecting the entire exchange server.

 Storage Management effortlessly: Exchange mailbox backup solutions usually offer compression and deduplication techniques to optimize storage utilization. These features help reduce the storage space required for backups, allowing you to efficiently manage your backup infrastructure.
 
There are multiple professional third-party tools that come in the online marketplace which makes Exchange Mailbox Backup process effortless and quick. Such as Shoviv Exchange Server Backup and Restore Tool. This tool comes with multiple user-centric features users can take backups into MBOX, EML, MSG, MHT, and HTML into multiple files. It can take backup into multiple mailboxes (Primary, Archive, and Public Folder) without restriction on sizes.

For more: Exchange Mailbox Backup