Supporting Messaging Clients

Use SSL with Basic Authentication

Secure Sockets Layer (SSL) is an encryption method for sending messages over a secure channel. If a virtual server is configured for Basic Authentication over SSL, a user must specify a valid Windows 2000 user account and password to log on. By default, IMAP4 virtual servers use port 993 for SSL communication. If you are configuring multiple virtual servers, you must change the default SSL port to create a unique combination of IP address, TCP port, and SSL port.

Important   In addition to setting the SSL port number, you must request and install a certificate to enable SSL on an IMAP4 virtual server.

To use SSL with Basic Authentication:

  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 Advanced.
  5. Select an existing IP Address, and then click Edit.
  6. Type an SSL port number, and then click OK.