In such cases, a backup can help you quickly restore the Exchange Servers and reconfigure the DAG.
However, if the DAG fails due to multiple member servers’ failure, boot issues, network problems, etc., users can’t access their mailbox-leading to downtime. But you must restore the failed member server immediately to ensure high availability. In most scenarios, users won’t notice a change in DAG environment. Why do you need to back up the DAG?ĭatabase Availability Group or member servers of DAG may degrade, fail, or not boot due to many reasons, such as: You still need to back up your mailbox database and other essential data from the DAG member servers and store them on at least two different storage devices at two geographically distant locations, preferably in another branch or office.īut how do you backup Database Availability Group and what are the best practices (or guidelines) to backup and restore DAG? In this article, we have answered these questions with examples and illustrations. However, it isn’t an alternative or substitute to backups. Database Availability Group (DAG) setup in Exchange Server provides high availability and site resilience with automatic database-level recovery in case of database, server, or network failure.
