Exchange 2010 and higher:- Fix a DAG’s ContentIndexState that failed

Quick tip:

If you have a DAG with a ContentIndexState showing failed, you can fix it with a simple command in the Exchange Management Shell (EMS):

  • Update-MailboxDatabaseCopy -Identity “DAGNAME\store” -CatalogOnly

This will then start a re-seed and it should return to a healthy state once complete.

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