Find the mailbox sizes And Export Exchange 2013 PowerShell
Get-Mailbox
Get-MailboxStatistics -server ex2016
Get-MailboxStatistics -server ex2016 | Sort-Object TotalItemSize -Descending | ft DisplayName,@{label=”TotalItemSize(MB)”;expression={$_.TotalItemSize.Value.ToMB()}},ItemCount
Get-MailboxStatistics -server ex2016 | Sort-Object TotalItemSize -Descending | ft DisplayName,@{label=”TotalItemSize(KB)”;expression={$_.TotalItemSize.Value.ToKB()}},ItemCount > c:\mailboxsizes.txt
Get-MailboxStatistics -database “DATABASE NAME” | Sort-Object TotalItemSize -Descending | ft DisplayName,@{label=”TotalItemSize(MB)”;expression={$_.TotalItemSize.Value.ToMB()}},ItemCount -auto
