Generate Mailbox Size and Usage Report using PowerShell for Exchange 2010 / 2013

An easy way to get a mailbox usage report is via the Get-Mailboxstatistics commandlet in powershell and a combination of other commands. The below script will output a mailbox usage report in HTML format:

 

Get-Mailbox -ResultSize Unlimited | Get-MailboxStatistics | Select DisplayName,
TotalItemSize,ItemCount,Database,LastLogonTime,LastLoggedOnUserAccount | Sort
TotalItemSize -Descending | ConvertTo-Html -Title "Mailbox Stats"|
Out-file "C:\MailboxStats.html"

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