When trying to connect to a VPN server, I get the 691 error code on the client, which say:

Error Description: 691: The remote connection was denied because the user name and password combination you provided is not recognized, or the selected authentication protocol is not permitted on the remote access server.

Now, I validated that the username and password are correct, and tried to login with domain name and without. I also installed a certification to use with the IKEv2 security type. I also validated that the VPN server support security method.

But I cannot login. In the server log I get this log:

Network Policy Server denied access to a user.

The user DomainName\UserName connected from IP address but failed an authentication attempt due to the following reason: The remote connection was denied because the user name and password combination you provided is not recognized, or the selected authentication protocol is not permitted on the remote access server.

Any idea of what can I do? Thanks in advance!