Yes, you’ll need to do two things after your account is migrated:
First, if you use a custom domain, you’ll need to go into your web hosting admin and go through the process of adding it again, but to app.proposify.com (no more .biz).
This article walks through how to do it.
Secondly, if you integrate Proposify with Harvest, Zoho, Hubspot, or Zapier, you’ll need to reconnect them after the migration is complete. This action shouldn’t take more than 10 minutes, and you won’t lose any information.