local user accounts and Exch 2000

[Me, Myself and I]

We recently began migrating users away from Exchange 5.5 and onto 2000. We
have several facilities such as labs and training rooms where the PC's are
not members of the domain, and the users log on using a local user account.
Sometimes this local account is named identically to their domain account
and sometimes it is not.

The problem... users in one of these facilities (they are the only users of
this type to have been migrated so far, so there may be more people
affected) are complaining that they can no longer use Outlook to read their
domain email. This is because the local machine (workstation) account does
not have permission to open the domain user's mailbox.

Because the users frequently "share" the local accounts (several trainees
using the same local account on the same local machine) it is not practical
to assign the accounts from the local machine to have permission to the
domain account's mailbox.

I am of the mind that the users will either have to use OWA (which is
working fine for them) or will have to log on to the domain to read email.
I am also a little surprised that they could use Outlook from the
stand-alone machines before their migration. Must be a 5.5 thing.

Just wondering if anyone knows any tricks to get around this.

Thanks!