I'm in the UK and just managed to get this working. I'm not sure if this would work outside of the UK though. I had to do the following on the car:
Settings -> Software Update. I followed the prompts using BMW teleservices and updated to the latest MX and TX releases. This took a while and you have to be stationary with the ignition on.
Telephone -> Bluetooth Menu. Press Option button and select Configure Bluetooth. Ensure that Office is enabled.
Reconnected my phone (4s with iOS6) to the car and ensure that Show Notifications is enabled as mentioned earlier in the thread.
Then go to Office and it should all work. When I receive a SMS or email I get the envelope icon on the Idrive and if I open the message I can see the message and have audio playback.
I'm very happy with this. Unfortunately all types of message are handled in the same way but you can set a filter.
Only new messages will sync so don't expect old content to show up
Last edited by grigz95; 09-21-2012 at 10:23 AM.