1.First, open the IVMS Client installation directory, find the libconfig_default.dll file, then use the new libconfig_default.dll file replace the old one.

  Path: D:\IVMS\Client\plugin\config\libconfig_default

2.Find the config file to change the AllowChangeDeviceInfoSetIDNO=1, then save it.

 MdvrCfgDll.ini file change AllowChangeDeviceInfoSetIDNO=1

3.Restart the IVMS Client, then you will find change Device Num function in the Parameter configuration.