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We recently encountered a transient network partition within our Exchange Database Availability Group. We are now concerned about the possibility of database divergence resulting from a split-brain scenario.
Could you please advise on the recommended approach for validating database consistency across all DAG members prior to returning the environment to normal service? We would particularly appreciate guidance on any built-in health checks or validation cmdlets that should be run at this stage.
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Hello @Lysa Analyst,
Given the concern regarding the recent transient network partition within the Exchange Database Availability Group (DAG) and the potential risk of database divergence associated with a split-brain scenario, I recommend raising a support ticket with the Microsoft Unified Support team.
I believe Microsoft Support is best positioned to perform a deeper assessment of the Exchange high availability environment, review the collected diagnostic information, analyze replication and cluster behavior, and determine whether there are any indicators of database inconsistency or additional actions required before the environment is considered fully stable.
Exchange DAGs are designed with safeguards to prevent split-brain conditions; however, a detailed review is advisable whenever there are concerns about database consistency following a partition event.
If you have any further concern, please feel free to let me know.