Hello Karen,
Thanks for reaching out! That is a great question!
The import will always run on the day of the month when you set it up. So if you set it up today (April 24th), then it will always run on the 24th of the month.
If you set it up on January 31st, then likely they will only run in month’s that have 31 days.
You can set up multiple scheduled imports for different days of the month, so that you import 100 every day. If you have an import set up for a day that has more than 100, then the ones above 100 will fail and they will not be rescheduled for later.
I hope this clarifies. Let me know if you have more questions.
Cheers,
Andras