Originally Posted by Check Essential

Yes. You have to check it after 3 PM.
I always get a screen capture at 15:01.

If they are not swamped, Crew Skeds is usually pretty good about giving you a "courtesy call" in those before 3 PM situations.
They do it all the time. "Hey, I see you early-acknowledged your short call for tomorrow but we have a trip that came up".

They don't have to do that though. Legally, you have to check after 3.