CentreStack is an Enterprise File Sync, Share, and Collaboration Platform. It can be hosted On-Premise with Active Directory integration. Guest users play an important role as three free guest user accounts can be created for every named user license purchased.
The guest users are users outside of the team users domain but receive file or folder shares from team user. Team user creates guest users through the file sharing or folder sharing activities. Tenant admin can also create guest users in Management Console\User Manager\Guest User Manager.
They can be assigned read-only permissions or can have full control on the shared content with read and write access.
Guest users can use all access clients which includes web browsers, Windows and MAC, and mobile clients.
The video below demonstrates how to create a guest user in Management Console\User Manager\Guest User Manager or during file or folder sharing.