NVivo Collaboration Server 15 is a separate application installed on a server at your institution. It allows multiple users in the network, on their local NVivo installations (Windows only), to work on the same project at the same time. Users see other users' changes in real time.
Each Collaboration Server installation has an administrator (blue in the diagram) who manages access to projects. Control access to a Collaboration Server project This topic Collaborate in a Collaboration Server project has information about how team members collaborate within a project.
For technical assistance, for IT administrators, see here.