Sets the connection dialog preference to be used with a particular IAP used for an internet mail service.
The connection control component (GenConn) allows various options for whether or not the user should be should be prompted with a dialog at connect time. For example, a connection using the first choice GPRS IAP might not show a dialog, but a second choice connection using GSM might bring up a warning.
Preference for what type of dialog is shown before a connection is made using the specified IAP.
The IAP identifier, as specified in the CommDb record for the IAP.