Some basic group types are embeded in LServerAdmin application.
Users of this group type have more rights than Simple Users, for LServerAdmin application and client OSs.
Users of this group type have restricted rights.
Note
Any user manually added in Linux OS (e.g. with adduser command) is shown in LServerAdmin as being a simple user. However he may not be a Windows Network User. To be sure it can login to Windows clients, it has to be explicitely added from LServerAdmin.
Students Group is equivalent to Simple Users Group as far as rights are concerned. See Simple Users Group for details.