Converts the string output of Get-MailboxFolderStatistics into MB that can be sorted.Not the easiest to read but functional. Only needed when running the CmdLet remotely.

Get-MailboxFolderStatistics.ps1

Get-MailboxFolderStatistics test@test.com | Select-Object name, @{
    Name="FolderSize";
    Expression={
        [math]::Round(([regex]::matches($_.FolderSize,'\(([^\}]+)\)').value -replace 'bytes', '' -replace '\(', '' -replace '\)', '' -replace ',', '') / 1MB, 2)
    }    
} | Sort-Object FolderSize -Descending