A default IMAP4 virtual
server is enabled when Exchange is installed. You can
edit the default virtual server settings to customize IMAP4
support. If you have clients that access the server or folders in
more than one way, you can create additional IMAP4 virtual servers.
Multiple virtual servers can be created on a single computer to
handle multiple local mail domains and to provide administration
for several messaging scenarios. The number of IMAP4 virtual
servers you can create is limited only by the resources of the
server.