This will enable specific engine error messages. It will replace generic Protocol Driver Errors with specific error messages
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | Software\Policies\Citrix\ICA Client\Engine |
| Value Name | Enable_EngineErrMsg |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |