The system administrator has restricted the type of logon
Basically, the error “the system administrator has restricted the type of logon” occurs when the RDP connections require Network Level Authentication (NLA).
It happens when the user is not a member of the Remote Desktop Users group.
https://ibmimedia.com/blog/217/the-system-administrator-has-restricted-the-type-of-logon-that-you-may-use
the system administrator has restricted the types of logon #registry
the system administrator has restricted the types of logon #windows server 2019
the system administrator has restricted the computers you can login with
the system administrator has set policies to prevent this installation
an administrator has restricted sign in
the administrator has restricted access to connect
the network administrator has prevented you from using the network
