I did not mention the previous version. This is the current versions.
Open your server.
on the side you will se a button/tab named “Scheduling”. it’s beneath the buttons / tabs for archives and restorepoints.
You have to enter a cron -job there, with the proper argument.
For an archive once a day you enter “0 0 * * *” under “cron Expression” and select “archive” under “command to run”.