Database availability group server cannot be removed from database availability group DAG since it is currently set for datacenter activation mode and it requires at least two mailbox servers

При попытке удаления сервера Exchange 2013 из Database Availability Group (не важно, через Powershell или ECP) столкнулся с такой ошибкой:   Database availability group server «MailboxServer» cannot be removed fromdatabase availability group «DAG» since it is currently set for datacenteractivation…

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