[Samba] Schedule samba backup

[Trenta sis]

Hi,

I was using samba backup offline, but seems that now is not working, a
bug is reported.

As a workaround I want to use online backup:

sudo samba-tool domain backup online --targetdir=<output-dir>
--server=<DC-server> -UAdministrator

Asking password in interative mode works, but I need to automate to
execute from crontab without asking pwd, how can I do this with
security?

Thanks