Powershell - reporting

# Report mailboxes over quota and the mailbox sizes
get-MailboxStatistics | where {"IssueWarning","ProhibitSend","MailboxDisabled" -contains $_.StorageLimitStatus} | format-Table DisplayName,TotalItemSize

# Report mailboxes and mailbox sizes
get-mailbox | get-mailboxstatistics | select-object DisplayName,TotalItemSize