date autocomplete - how do you turn it off?

I'm posting the below message this second time as I'm desperate to get this
sorted out.
In answer to the MVP who replied, yes have tried turning off all opssible
options in tool/options/autocorrect.
Here's the orignal post:
_________________________
HI all

We have a small network of 50 users on SBS2003 and Office 2007.

One of the main gripes here is that when you are in Outlook 2007 and create
an email, if you start typing the date, e.g. "15 October 2009" when you get
to the "2009" Outlook automatically inserts "-10-15" so your date becomes "20
October 2009-10-15" if you press enter. (the -10-15 represents the current
date, month/day).

As you can imagine most people do then then curse as they go back up to
delete the -10-15".

It is the same in Word of course, I've managed to run a macro on my onw
machine which turns off the autocomplete in Word (and I'd like to use that
in GPO if I could find out how) but also I'd love to be able to disable this
annoying "feature" in Outlook.

I simply cannot believe this feature exists and cannot be turned off, but
after much searching no one seems to be able to do this in Outlook?

I've tried running the macro in Outlook but it will not run, but as far as
I'm concerened there should be a simple GPO setting to disable this.

I've searched the registry on my own machine to try and find any indication
of this setting but to no avail.

Any help at all would be fantastic.
Thanks in advance.