You can use the Microsoft Volume
Shadow Copy Service (VSS) framework to produce an online snapshot
(point-in-time consistent copy) of Exchange data.
Types of database backups Data Protection for Exchange supports different types of database backups: a full backup, copy backup, incremental backup,
and differential backup. You can complete these types of database backups within a Volume Shadow
Copy Service (VSS) framework that provides a common interface model for generating and managing
online snapshots.
Volume Shadow Copy Service framework Data Protection for Microsoft
Exchange provides software and hardware vendors with a
common interface model for generating and managing snapshots.
Data backup methods Data Protection for Exchange uses the VSS method
for backing up data. Data Protection for Exchange also
supports backup operations in a Database Availability Group (DAG) environment.