In an Exchange 2000 Server environment in which there are two or more virtual domains that are hosted on a single front-end server/back-end server setup (for this example, www.expedia-1.com and www.expedia-2.com), if a client that is using Microsoft Internet Explorer to gain access to Microsoft Outlook Web Access (OWA) is communicating with a mailbox on www.expedia-1.com and then switches to a mailbox on www.expedia-2.com, the server may return the following error message:
You may be able to press the
Refresh button several times in Internet Explorer to display the authentication and login dialog box.