Actually, you can see it before 10 days, but you can't complete the process. They don't make easy to find that is for sure. Thanks to BWV Dreamin for giving me directions.
Go to... DVCmembers.com
Under MY MEMBERSHIP click MY VACATION POINTS
Then click on VACATION DETAILS
Then under UPCOMING VACATIONS click on ENTER CELEBRATION INFORMATION
Then, if your info is correct click CONTINUE
Then you will see under MY DISNEY RESERVATION OFFERINGS a place for ONLINE CHECK-IN SERVICE.
You would think this would be a front page link, but NOT.
There have been posts where people who used it had problems. Someone posted that the requests they put on their reservation were wiped out by online check-in.