Neal's Admin.Notes.

Exchange 2007 Legacy Mailbox to User Mailbox

If you mistakenly create a mailbox user with ADUC ( Active Directory Users and Computer ) you will notice that the mailbox you created for that user is a tagged as a legacy mailbox. You will loose some features of Exchange 2007 in this mode. To fix this you need to remove the legacy tag in Exchange 2007. The following cmdlet will make it a User Mailbox when you run it in Exchange Shell.

Set-Mailbox -Identity "alias" -ApplyMandatoryProperties

Just change "alias" with the mailbox name or the alias and keep the quotations on it.

How to get Mailbox Size in Exchange 2007

Getting mailbox size info is very different from the simple list view in previous Exchange versions. However if you take some time and use the Powershell/Console, you can extract all the information you need.
Here is a niffty command that you can use to generate a report that will give you some statistics on your users mailbox sizes. It requests information on mailboxes greater than 1 MB and outputs the data to a txt file. You can however modify it with other various shell commands.


Get-MailboxStatistics |where {$_.TotalItemSize -gt 1MB} | sort $_.TotalItemSize |FT DisplayName,ItemCount,TotalItemSize >c:\size.txt