Hi,
I ended up logging a support ticket for this, and the following worked eventually:
We are using IMAP to connect (secure), so
[pop-client xxxx]
port=993
type-IMAP
server=MailServerAddress
mailbox=domain\user\sharedbox
(where the mail box is
sharedbox@domain.co.nz)
mail.imap.auth.mechanisms=LOGIN
mail.imap.auth.ntlm.disable=TRUE
mail.imap.auth.plain.disable=TRUE
Sean.