There is no usb device in the "Virtual Machine-Removable Device" on the upper bar of vm virtual machine, which is caused by the wrong setting. The solution is as follows:

1. Install the server software and log in to the server management terminal.

2. Set up users. In the "User Management" menu, establish the user's basic information, usage rights, authorized IP address, etc.

3. Add equipment. If the added device network segment is different from this server network segment, you need to modify the ip address of the added device.

4. Configure the USB port and assign the right to use the port. Click "Load Port" in the "Port Settings" interface of "Device Management", and the UKey connected to the device will be automatically loaded.

5. Double-click each port to set the UKEY information of the port connection.

6. Users who assign USB ports.

7. Operation log. The server records all the operation logs of each port and user, which is well documented and meets the requirements of safety supervision.