In Integrations > Dotdigital > Sync you can configure a daily scheduled update for each of your Dotdigital accounts.
Select the Constituent list you wish to update from, and the Dotdigital address book you wish to update.
The scheduled updates are run at 9pm GMT each day.
Get an email summary
You can enable this in your email notifications within your Profile (top right of your screen).
To access the Dotdigital integration you'll need to raise a support ticket