Leaving "Mailbox" empty will (AFAIK) only work from Exchange 2003 SP2 upwards.
If no mailbox is specified, the e-mail address wil be used so that Evolution searches for the following OWA-address:
https://<email address hidden>
However this feature is only available from Exchange 2003 SP2 upwards (once again: AFAIK).
Leaving "Mailbox" empty will (AFAIK) only work from Exchange 2003 SP2 upwards.
If no mailbox is specified, the e-mail address wil be used so that Evolution searches for the following OWA-address:
https://<email address hidden>
However this feature is only available from Exchange 2003 SP2 upwards (once again: AFAIK).