2. Fast Search Foundation for Exchange Server 2013, Mailbox database Content index State is ‘Failed’. AdminNodes are Terminating.

Here was the situation: Search function stopped working on Exchange server 2013. Users are not getting any results.   No Issues noticed with Microsoft Exchange Search service and HostCotrollerService.  However, Get-MailboxdatabaseCopyStatus reported “Failed” state on all Mailbox databases. – Restart “HostControllerService”.  Service restarted, but AdminNodes failed to start  with HostCotrollerService.   – Resetting the Content index on every database do not help, because Admin nodes…

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1. Exchange Server 2013 /PrepareAd or Cumultive update installation fails.

Exchange server 2013 /PrepareAD or installing Cumulative Updates [ CUxx ] fail with the error, while running Organization Preparation The following error was generated when “$error.Clear(); install-AdministrativeGroup -DomainController $RoleDomainController ” was run: “Active Directory operation failed on Servername.domain.com. The object ‘CN=Folder Hierarchies,CN=Exchange Administrative Group (FYDIBOHF23SPDLT), CN=Administrative Groups,CN=Exchange Organization,CN=Microsoft Exchange, CN=Services,CN=Configuration,DC=Domain,DC=Com’ already exists.” The Exchange Server…

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