A corporate windows active directory :-( is responsible of user credentials on an Ubuntu 18.04 LTS. It's using samba and sssd on the Linux side.
I had to add ad_gpo_map_interactive = +cron in the sssd.conf in order to allow cron for those users.
Since an apt upgrade which happened 4 weeks ago, the active directory credentials does not works anymore.
I've found today that the ad_gpo_map_interactive is not recognised anymore. I have removed that line and it works like a charm... Also, cron works now without that directive.
But, well, I don't understandt what happened. And since it has to deal with security ... I'm not confident.
Thanks a lot. Michael