1. Configure lmb enrollment plugin in the normal way making sure that icgorldi.xml and lmb.log files are presnet
2. Execute importnow.php using a crontab entry similar to :
45 06 * * * root /usr/local/bin/wget -O - --no-check-certificate https://moodle.xxx.edu/enrol/lmb/importnow.php
3. The system demands login authentication before it will proceed.
4. Attempt to run the importnow.php with /usr/local/bin/php instead of wget gives error 'Command line scripts must define CLI_SCRIPT before requiring config.php'

This is a major change from 1.9 and one which I could not find documented anywhere.
We circumvented the problem by checking the box 'check XML file during cron' which executes importnow via cron.php.