Vista - Powershell Exchange 2003 Quota Defaults

Do any of you perhaps know of a way to get the default mailbox store quotas ?

My code is giving me values if someone set it by hand , but not what the default values are..

$Namelist = Import-CSV Namelist.csv
foreach ($line in $NameList) {Get-QADUser -DisplayName $line.DisplayName -IncludedProperties 'mDBUseDefaults','mDBStorageQuota','mDBOverQuotaLimit','mDBOverHardQuotaLimit','mDBOverQuotaLimit' | Select-Object displayname,mDBUseDefaults,mDBStorageQuota,mDBOverQuotaLimit,mDBOverHardQuotaLimit,AccountIsDisabled,AccountIsLockedOut}

output :
DisplayName : Barah Tony
mdbusedefaults : False
mdbstoragequota : 450000
mdboverquotalimit : 550000
mdboverhardquotalimit : 650000
AccountIsDisabled : False
AccountIsLockedOut : False

DisplayName : Montaque Elvin
mdbusedefaults : True
mDBStorageQuota :
mDBOverQuotaLimit :
mDBOverHardQuotaLimit :
AccountIsDisabled : False
AccountIsLockedOut : False

DisplayName : Copaner Justice
mdbusedefaults : True
mDBStorageQuota :
mDBOverQuotaLimit :
mDBOverHardQuotaLimit :
AccountIsDisabled : False
AccountIsLockedOut : False