On Windows Events (Microsoft-Windows-TerminalServices-Gateway/Operational) appears records with event ID’s 312, but the connection does not authenticate successfully. Remote Desktop Gateway does not support Kerberos authentication, which use Remote Desktop Client with version >= 8.0
On Remote Desktop Gateway server set the EnforceChannelBinding registry value to 0 (zero) to ignore missing channel bindings on the Gateway server. Reboot for applying changes.
Value: 0 (Decimal)
- On client change Local Policy LAN Manager Authentication Level. Adjust the NTLM Manager setting on the client to be "Send LM & NTLM - use NTLMv2 session security if negotiated".