If enabled, if a user attempts to use a Duo Mobile OTP code but has no devices that support it, then the client will report an error and not attempt authentication with the service. If disabled, the client will attempt to authenticate with the code, and then display an "Incorrect Passcode" error in the status bar.
Default: Enabled.
| Registry Hive | HKEY_LOCAL_MACHINE |
| Registry Path | SOFTWARE\Wow6432Node\Policies\Duo Security\Epic |
| Value Name | GuiErrorOnDisabledMobileOtp |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |