Outlook 2010 and domain change

Hi ,

We need to change our domain name in the next few weeks from one custom domain to another.  Our users currently use Outlook 2010 on their desktops.   I need to know how the domain change will affect these users.

Questions:

Do they need to setup a new outlook profie on their desktops ?

Will things like personal contacts and archives need to be transferred to new profiles ?

If theres is anything else im required to do for Outlook 2010 users please let me know.

Thanks in advance

Rich7