When you say "Cron jobs on Author" are you referring to a scheduler service on Author and you are using cron expressions to fire the scheduler service?
Yes - sorry if my question was a bit unclear.
We are running a scheduler service on Author and are not sure how to handle jobs that perform management on external users (members) if these are only stored on Publishers.
Typically user are on both Auth and Pub - especially if you are running services - like the Scheduler service that needs them.
But as far as I understand all the documentation on AEM 6.3 (and especially Communities) you recommend User Synchronization for external users (members) in which case they are stored only on Publishers.
Have I misunderstand the concept of the new User Sync feature?