Run advertisement at every logon event

Hi,

From the reading I've done, I have come to understand that it is not possible for SCCM to run an advertisement at every logon. Am I correct?

I know that I can set a recurring schedule based on a date/time, but I want it to be on the 'login' event.

Alternative?:

If I was to set a recurring schedule (every day at a time before the first user logs in - like 2am), would it trigger on the user's next login?

thanks