Question / Problem:
One of our users gets approval alerts instantly even if we have set the notification alerts to daily, on customer level.
Answer / Solution:
If the user in question is a customer group level user, he/she will inherit the alert settings from the partner level.
Please check the workflow alert setting on partner level. If the notification alerts setting is set for instantly on partner level, the customer group level user will get alerts instantly, even if the notification alerts for the customer workflow is set to daily.