Best practices for Roaming Profiles and Outlook on Exchange.

Hi,

We have just setup a new server for a client.
We're running the new SBS 2011.

We have 11 client machines on this network, 5 of which are used for hotdesking for 30 or so employees all with their own user and mailbox setup in active directory.

8 of the machines are running Windows Vista and 3 of them are still running Windows XP.

For the users that hotdesk, we have setup enabled roaming profiles and given them all a Home Drive on the server and have told them to store ALL of their files there as to keep things quick when logging in and out of the machines. Also I am aware that the roaming profiles will not carry from an XP machine to a Vista machine and vice versa.

I was hoping to get some best practices for using Outlook 2003.

So far, using Group Policy I have disabled the creation of OST files and turned off Cached Exchange Mode. I understand this is recommended when using roaming profiles?

At the moment when a user logs in to a machine they haven't used previously, they are required to input the Exchange server details. Should a roaming profile carry these settings across assuming the version of Outlook is the same?

Also I assume each time a user logs in, the entire mailbox would need to be downloaded? Or is this only the case with a machine they haven't previously used? I assumed cached mode and the OST creation being disabled would mean this?

I would be very grateful for any suggestions for the best setup using Roaming Profiles and using Outlook on Exchange.

Thanks in advance!

Arran