Limited only by the resources of the computer, a virtual server can accept an unlimited number
of inbound connections. To prevent a computer from becoming
overloaded, you can limit the number of connections that can be
made to the IMAP4 virtual server at one time. You can also limit
the length of time that idle connections remain logged on to the
By default, Exchange does not limit the number of incoming
connections and disconnects idle sessions after 30 minutes.