Supporting Messaging Clients

Set Connection Limits

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 server.

By default, Exchange does not limit the number of incoming connections and disconnects idle sessions after 30 minutes.

To set connection limits:

  1. Start System Manager
    on the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.
  2. Navigate to IMAP4.

    System Manager

    1. Administrative Groups
    2. Administrative group
    3. Servers
    4. Server
    5. Protocols
    6. IMAP4
  3. In the console tree, right-click a virtual server, and then click Properties.
  4. On the General tab, click Limit number of connections to, and then type an integer between 1 and 999999999.
  5. In Connection time-out, type the number of minutes that can elapse before idle connections are disconnected.

  6. Warning   Setting the time-out too low can cause clients to be unexpectedly disconnected from the server and possibly receive error messages. Thirty minutes is the lowest recommended time-out setting.