If you need to view mailbox sizes for users in your Exchange
organisation, you can do this from an Exchange Management Shell (EMS)
for both Exchange 2003 and Exchange 2007/2010.
For your Exchange 2007/2010 users use the following command from EMS:
get-mailboxstatistics | fl displayname,totalitemsize
For your Exchange 2003 users use the following command from EMS:
Get-Wmiobject -namespace root\MicrosoftExchangeV2 -class exchange_mailbox -computer Ex2003ServerName | sort -desc size | select storageGroupName,StoreName,MailboxDisplayName,Size,TotalItems
For your Exchange 2007/2010 users use the following command from EMS:
get-mailboxstatistics | fl displayname,totalitemsize
For your Exchange 2003 users use the following command from EMS:
Get-Wmiobject -namespace root\MicrosoftExchangeV2 -class exchange_mailbox -computer Ex2003ServerName | sort -desc size | select storageGroupName,StoreName,MailboxDisplayName,Size,TotalItems
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