Automount consensus not reached : Databases Dismounted

[PS] C:\>Get-MailboxDatabase | Mount-Database -Force

Failed to mount database “DB”.
Error: An Active Manager operation failed. Error: An Active Manager operation encountered an error. To perform this operation, the server must be a member of a database availability group, and the database availability group must have quorum. 

Error: Automount consensus not reached.
 []+ CategoryInfo : InvalidOperation: (DB:ADObjectId) [Mount-Database], InvalidOperationException+ FullyQualifiedErrorId : [Server=ESES01,RequestId=3d5688E4-1976-3r88-b555-2nm8dd88fg99,TimeStamp=4/4/2020 04:04:04 AM] [FailureCategory=Cmdlet-InvalidOperationException] 26486D4A,Microsoft.Exchange.Management.SystemConfigurationTasks.MountDatabase+ PSComputerName :


Resolution –


Note : In my case – Server in my primary site,DAC(Datacenter Activation Coordination mode) is ON , Databases are already in Exch01. Started DAG saying ESES01 is live and functional and to check the started and stopped DAG members to come out the confusion.

Now Mounted all databases Successfully.

Enis Göktay

Enis Göktay

Enis has more than 15 years of experience in Information Technologies. He holds a Bachelor of Science in Economy and Master of Science degree in Computer Engineering as well as several IT certifications, namely MCITP, MCSE and CISCO Certifications. He has experience from technical support to administering enterprise IT infrastructures including but not limited Active Directory, Messaging Infrastructures, and Networking. Currently, he lives in Istanbul and works as a Sr. Specialist on Microsoft Products, dealing with administration of full life cycle of large, complex, and high available Enterprise IT infrastructures. His certifications include:

:: MCSE Data Platform,
:: MCSE Private Cloud,
:: MCSE Messaging,
:: MCSE Communication,
:: MCSE Server Infrastructure,
:: MCITP Enterprise Messaging on Exchange 2010
:: Microsoft Specialist - Server Virtualization with Windows Server Hyper-V and System Center Specialist
:: MCITP Enterprise Administrator 2008
:: MCITP Windows Server 2008,
:: MCSA: SQL Server,
:: MCSA: Office 365 Certification
:: MCSA Windows Server 2008,
:: MCTS Microsoft Exchange Server 2010, Configuring
:: MCTS Windows Server® 2008 Network Infrastructure, Configuration
:: MCTS Windows Server® 2008 Active Directory, Configuration
:: MCTS Monitoring and Operating a Private Cloud with System Center 2012
:: MCP (Microsoft Certified Professional)
Enis Göktay

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