The following SWQL Query should get you pointed in the right direction.
SELECT TOP 1000 a.Name, a.Status as [ApplicationStatus], a.DetailsUrl as [ApplicationDetailsUrl], mb.DisplayName, mb.Status as [MailboxStatus], mb.DetailsUrl as [MailboxDetailsUrl], '<a href="mailto:' + mb.PrimarySmtpAddress + '">' + mb.PrimarySmtpAddress + '</a>' as [PrimarySmtpAddress], mb.Type, mb.MessagesReceived, mb.Database.Identity, mb.Database.Status as [DatabaseStatus], mb.Database.DetailsUrl as [DatabaseDetailsUrl] FROM Orion.APM.Exchange.Mailbox mb JOIN Orion.APM.Exchange.DatabaseCopy dc ON dc.DatabaseID = mb.DatabaseID JOIN Orion.APM.Exchange.Application a ON a.ApplicationID = dc.ApplicationID WHERE dc.ID in (SELECT ID FROM Orion.APM.Exchange.DatabaseCopy WHERE IsActive = 1) ORDER BY MessagesReceived DESC