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Managing the Store & DAG: EXCERPT from Microsoft® Exchange Server 2013 Inside Out by Tony Redmond

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Database portability

Exchange Server 2007 introduced the concept of database portability. You can mount a mailbox database from one server on another server. Exchange 2010 and Exchange 2013 both support database mobility. The major difference between portability and mobility is that you are not moving a database from server to server. Instead, you move the active focus for client connections and workload between copies of a database. All the copies of a database share the same globally unique identifier (GUID) or identity, so each can function as the active master no matter on which server it is currently located. Database copies also must have the same path on the server for database and log files. The ability to move databases around servers ...

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