Architectural Changes in Microsoft Exchange

If you have been working with Catalogic DPX and earlier releases of Microsoft Exchange, it is useful to understand the architectural improvements in Exchange 2010/2013/2016 that affect data protection management.

• Storage groups are replaced by individual databases, which are managed separately.

• The Exchange Recovery Storage Group (RSG) is replaced by the Exchange recovery database (RDB). A recovery database is a special kind of mailbox database that allows you to mount a restored mailbox database and extract data from the restored database as part of a recovery operation. Recovery databases enable you to recover data from a backup or a copy of a database without disturbing user access to current data. For considerations related to the recovery database, see Restoring to an Exchange Recovery Database.

• The Database Availability Group (DAG) replaces cluster continuous replication (CCR), single-copy clusters (SCC), and local continuous replication (LCR). A DAG is a group of up to sixteen mailbox servers that host a set of databases and provide automatic database-level recovery from failures that affect individual servers or databases. Any server in a DAG can host a copy of a mailbox database from any other server in the DAG.