Error Description: 13801: IKE authentication credentials are unacceptable

Tried to connect Windows 7 client to the pfSense® with IKEv2 and native Windows IPSec VPN client. Everything was setup using IKEv2_with_EAP-MSCHAPv2 and every-time trying to connect I got "Error Description: 13801: IKE authentication credentials are unacceptable". After searching and troubleshooting it turned out that importing CA cert to the Windows 7 client PC must be done only via mmc console otherwise certificate is shown as installed but nothing works as expected.

PS to install CA certificates use this link: Import_Root_Cert_mmc