IGEL Shared Workplace is an optional, licensed feature of the IGEL OS firmware. It allows user-dependent configuration using profiles created in the IGEL Universal Management Suite and linked to the AD user accounts. In the process, user-specific profile settings are passed on to the device along with the device-dependent parameters.
You will find the complete documentation here: Shared Workplace.
If you deactivate Enable Shared Workplace under UMS Administration > Global Configuration > UMS Features, the structure tree node Shared Workplace Users will be hidden and Shared Workplace users will NOT be able to log in!