How to perform an automated brick-level (mailbox level) Exchange 2003 backup

Ohh those were the easy, happy and uncomplicated times when people used Windows 2003 SBS and Exchange 2003 servers. Even if it's EOL now there are still many companies out there where managers don't give a heck to security considerations and warnings.
Restoring a relatively large Exchange database from ntbackup is one of those things that none of the sysadmins are raving about. I mean, restoring the whole database just because a skilled user accidentally deleted an "extreme-important-and-high-business-valuable" email.
It's a known sad fact that Exchange 2003 lacks the feature of keeping soft-deleted items in the database for the retention period. So in the above example you don't have any other choice than restoring everything into a second recovery database. That would be funnier if your server partitions are going full and you have no free space to fill with a second multi-gigs database.
One solution would be to use Exmerge but scripting it is maybe the largest pain in the ass I've ever seen and it still can't export mailboxes larger than 2Gigs. Forget it.
But here is my genious method to backup your users emailing daily. All you need is a Windows backup PC on the network with two hard drives: a smaller for your system partition and a larger one to store the backups. And, an Outlook 2010 installed in that system. (Ehm, just a sidenote: you don't need to activate that Outlook anyway.)

First, you need an account which has all the necessary rights to export databases. Create a user named, for example, exmerge with a super-secure password. Just to be an the safe side and be careless enough, add it to your Administrators group.
Open your System Manager and give all rights to exmerge on your Mailbox Store.

That was everything on your server. Go to your backup PC. Open your Outlook 2010 and set up the account of your exmerge user. Older versions of Outlook are no good because they don't cache shared mailboxes for offline use.
Having done, go and get a coffee.Then:

•     In Outlook click File tab in the Toolbar
•     Click Account Settings button, select Account Settings
•     Select the E-Mail tab
•     Highlight your mailbox, click the Change button
•     Click the More Settings button
•     Select the Advance tab
•     Click the Add button
•     Type the first characters of your first user's name and let Outlook resolve it with Add button.
•     Repeat previous step again and again for all the users in your organization
•     Click the Apply and Ok buttons
•     Click Next, Finish, and Close buttons

Now let this PC alone and don't touch it during the next 24 hours. Hopefully one day will be enough to download all the emails your users have. It's a good idea to encrypt both hard disks in this machine because, as you may guessed already, all those highly confidental emails will get in those Outlook and your local system hard disk. The exact location you can find that cache file having .ost extension at is something like:
C:\%your user profile%\Local Settings\Application Data\Microsoft\Outlook\Outlook.ost
It will grow pretty large, similar to the size of your exchange priv1.edb file.

Okay, one day later you will have all emails cached and the Outlook GUI responsible again. Now you need a simple scheduled .bat to start Outlook. Outlook needs a few quiescent hour to syncronize all mailboxes. Let it do its jobs.
Some hours later stop it gracefully via, e.g. a runme.bat file including:
@echo off
cscript "c:\scripts\CloseOutlook.vbs"
:EXIT
and that CloseOutlook.vbs contains:
Dim oOL
Set oOL = CreateObject("Outlook.Application")
oOL.Quit
Then grab your whole folder on your C: (if you want to be sure) and copy it with a cleverly parametered xcopy or with any free backup software (e.g. Cobian Backup) onto your second drive. Don't run out of space! Make sure you keep just the sufficent number of versions of the .ost file.
How to restore? It's easy! DO NOT START your Outlook! Instead, open your Control Panel and find Mail. Open it and select Email accounts.

• Select the Exchange account, and then click Change.
  
• Click More Settings. 
• Choose whether to work offline or online each time you start Outlook     Click Manually control connection state, and then select the Choose the connection type when starting check box.
• Exit
• Start your Outlook and select Offline mode.
• Find the missing emails within the mailbox in question.
• I am a hell damn genious!