Hi Liam,
Trimble Access provides up to three Connect Business Licenses per current Software Maintenance Agreement. Once a user is assigned a Connect Business license it is possible to use an unlimited number of projects with Trimble Connect.
The Upgrade Trimble ID link at https://connect.trimbleaccess.com/ includes information for assigning the Trimble Connect Business Licenses.
TCC cannot be used with Trimble Access 2018.
A discontinuation notice has been sent out to all Trimble Access, TCC organization Sitemanagers advising that they should transition to using Trimble Connect prior to August 2019
Regards
Chay