You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "POP3 and IMAP4" entry in the Client Access Permissions topic.

1. In the console tree, navigate to Server Configuration > Client Access.
   
   
2. In the work pane, click the POP3 and IMAP4 tab.
   
   
3. Select IMAP4 and then, in the action pane, under IMAP4, click Properties.
   
   
4. On the IMAP4 Properties page, click the Authentication tab.
   
   
5. Under Logon Method, select one of the following:
   
   
   1. Plain text logon (Basic authentication)   No TLS connection is required for the client to authenticate to the server.
      
      
   2. Plain text authentication logon (Integrated Windows authentication)    No TLS connection is required for the client to authenticate to the server.
      
      
   3. Secure logon   A TLS connection is required for the client to authenticate to the server.
      
      
6. Click Apply, and then click OK to save your changes.
   
   

You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "POP3 and IMAP4" entry in the Client Access Permissions topic.

This example allows Basic authentication on an unsecured port if you won't be using TLS encryption,

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Set-ImapSettings -LoginType PlainTextLogin

This example restricts Basic authentication to use only secured ports if you won't be using TLS encryption.

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Set-ImapSettings -LoginType PlainTextAuthentication

This example allows authentication after you use TLS encryption.

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Set-ImapSettings -LoginType SecureLogin

For more information about syntax and parameters, see Set-ImapSettings.

After you configure authentication for IMAP4, you may also want to:

• Configure Ports for IMAP4 Authentication
  
  
• Set Connection Limits for IMAP4