You can. You will need your DVC "reservation number"---on an II confirmation, that can be found in the upper right hand corner of the first page. It is a 12-digit number. The 9-digit "confirmation number" is for Interval's internal use. You may also need to call Member Services to make sure that your name and phone number are in DVC's reservation record. The Member Services phone number (an 800 number) can also be found on your confirmation.
Once you've done all that, you should be able to pull up your reservation in your name on Disney's ADR system. You can do this before the 90-day window opens, as a test to make sure everything works.
