The Access application is the gateway for Red Pill systems. Systems set up before 2015 have Access URLs that are specific to a client - e.g. www.sealedenvelope.com/abc_trialsunit. Systems set-up after 2015 generally have the same common URL: www.sealedenvelope.com/access. In either case the URL will be contained in automated emails sent out when a new user account is created.
Users are requested to authenticate themselves by providing their log-in credentials. See the Access help for more information.