Here is a tip how to gather disk statistics such as
CapacityGB, FreeSpaceGB, FreeSpace% for all disks in your Exchange organization.
$vols = @() Get-ExchangeServer | % { $comp = $_.Name $vols += Get-WmiObject -computername $comp -query "select Name, DriveType, FileSystem, FreeSpace, Capacity, Label from Win32_Volume where DriveType = 2 or DriveType = 3" | select @{Name='Server';Expression={$comp}},Label,Name,@{Name='CapacityGB';Expression={$_.Capacity/1GB}},@{Name='FreeSpaceGB';Expression={$_.FreeSpace/1GB}},@{Name='FreeSpace%';Expression={($_.FreeSpace*100)/$_.Capacity}} } $vols | Export-Csv -NoTypeInformation -Delimiter ";" -path "E:\ExchangeDiskreport.csv"