Exchange Get-MailboxFolderStatistics FolderSize to MB - powershell

Question

Morning folks, and what a sad day it is to be British.
Anyway, I'm trying to get MailboxFolderStatistics's FolderSize to MB.
The following line:
Get-MailboxFolderStatistics Joe.Bloggs |
Where-Object { $_.FolderPath -ne "/Deletions" } |
Select-Object FolderPath, #{ N = "FolderSize (MB)"; E = { $_.FolderSize.ToMB() } }
works fine when I'm using Exchange Management Shell.
But if I'm using a remote PS session into one of my Exchange boxes, I don't get anything for FolderSize.
Any ideas?

Answer 1

It's because the Exchange Management Shell you run on the server includes a type named Microsoft.Exchange.Data.ByteQuantifiedSize that gets converted to a System.String through remoting. The former exposes a ToMB() method, the latter does not.
I have written a workaround, but maybe there is a simpler and/or prettier method :
Get-MailboxFolderStatistics Joe.Bloggs |
Where-Object { $_.FolderPath -ne "/Deletions" } |
Select-Object FolderPath, #{
N = "FolderSize (MB)";
E = {
"{0:N2}" -f ((($_.FolderSize -replace "[0-9\.]+ [A-Z]* \(([0-9,]+) bytes\)","`$1") -replace ",","") / 1MB)
}
}
This uses a regular expression to turn the ugly string (example : 3.712 KB (3,801 bytes)) into a usable number. On my system , is not a valid digit grouping symbol so I had to remove it from the string, too.

Answer 2

You can use the following lines to get the $_.FolderSize represented in [decimals]
Select-Object #{
N = "FS_MB";
E = {
[math]::round( ([decimal](($_.FolderSize -replace "[0-9\.]+ [A-Z]* \(([0-9,]+) bytes\)","`$1") -replace ",","") / 1MB),2)
}
}

Answer 3

Typically when looking at folder sizes there is desire to sort them by size descending. To achieve this we need to know the FolderAndSubfolderSize in Bytes and store that in a bigint property as opposed to System.String. It's not rocket science to convert Bytes to Kb,Mb,Gb so I won't go into that here.
In-line syntax for dynamically adding a new property FolderAndSubfolderSizeBytes (I've used backticks to split over several lines for legibility only)
Get-EXOMailbox -Identity user.name#domain.com`
| Get-EXOMailboxFolderStatistics `
| Select Name,FolderAndSubfolderSize,#{`
name="FolderAndSubfolderSizeBytes";`
expression={((($_.FolderAndSubfolderSize -replace '^(.*\()(.*)(\sbytes\))$','$2').Replace(',','')) -as [bigint])}} `
| Sort-Object -Property FolderAndSubfolderSizeBytes -Descending | ft
Long-hand add new properties to variable object for later re-use
$mb = Get-EXOMailbox -Identity user.name#domain.com | Get-EXOMailboxFolderStatistics
foreach ($folder in $mb) {
$folder | Add-Member -NotePropertyName FolderSizeBytes -NotePropertyValue ((($folder.FolderSize -replace '^(.*\()(.*)(\sbytes\))$','$2').Replace(',','')) -as [bigint])
$folder | Add-Member -NotePropertyName FolderAndSubfolderSizeBytes -NotePropertyValue ((($folder.FolderAndSubfolderSize -replace '^(.*\()(.*)(\sbytes\))$','$2').Replace(',','')) -as [bigint])
}
$mb | Select Name,FolderPath,FolderAndSubfolderSize,FolderAndSubfolderSizeBytes | Sort-Object -Property FolderAndSubfolderSizeBytes -Descending | ft