I have Virtualmin installed on Ubuntu 16.04.1 with nginx in place of Apache. I activated LetsEncrypt SSL a few months ago, with auto renewal set to 2 months. A few days back, I received a renewal reminder from LetsEncrypt so I logged into Virtualmin and saw that my certificate shows its last renewal date as 2.4 months ago. Thus, it seems the auto update did not work. I was able to trigger a manual update though.
I looked into the Scheduled Cron Jobs and can't find anything relating to LE inside there. Is there anything wrong with my configuration that doesn't allow LE to autorenew?