I am running an Exchange Server 2003 with about 75 accounts. One of the accounts suddenly cannot see any email in their Inbox when in OWA, but the messages are there in Outlook client. Yet some other mail does show in OWA, such as "Sent Items".
I have viewed other solutions to this problem here at EE, but none are relevant to this situation. For instance, we are not viewing "Unread" messages. And new emails show up in Outlook, but not in OWA.
What other things can I look at to find out what is causing this?