Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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How can i get Yearly usage of user mailbox and shared mailbox reports?
As the built-in reports don't cover such timespan, you only option would be to store the data in an external system and aggregate it over the time period in question. Or use a third-party reporting product that offer similar functionality.