There is nothing you need to do in advance of the migration. ProQuest Customer Service will be setting up each Dissertations & Theses @ account on the ProQuest platform.
If your institution does not have a ProQuest platform account, one will be created for you.  For information about your new account, please contact customer_service@proquest.com.

After this phase of the migration, all Current Research @ usage will be automatically redirected to the ProQuest platform. Once this new release is in place, though, you will want to change any links on your website that direct users to Current Research @ so that they direct users to the ProQuest platform instead.