How do I obtain a report showing the top 10 largest mailboxes in the organization ?

I would like to know what report can give me the top 10 largest mailboxes in the organisation.

The report template you are looking for is called Mailbox Storage Information and you will find it on the Templates > Storage menu. Information is dynamically collected through a MAPI connection to the Exchange server (up to Exchange 2007) or via PowerShell (from Exchange 2010 onwards).

You will apply the following settings:
  • Selection tab: All organization mailboxes.
  • Group tab: No grouping (Organization), Ascending. Select the Grand total check box.
  • Filter tab: N/A.
  • Options tab: As shown below.
  • Content tab: Mailbox storage (item size and count).
  • Presentation tab: Style = <None>, Display = Table (for a table only), Graph (for a graph only), Graph & Table (for both), Size in MB = MegaBytes.
  • Output tab: Your own choice (Screen, Printer, Disk file, Email recipient, Exchange folder, Sharepoint).
See also:

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