L2TP with IPsec on windows server behind Mikrotik

Hello,

I have question about setting L2TP with ipsec behind Mikrotik router.
Reason is that I will use windows credentials for vpn accounts.
I have pass trough all ports to windows server. VPN is still not working. I see data counter rising on mikrotik but connection is not made.
Is anyone familiar with this, maybe some advice about additional work that must be done on router to pass trough L2TP with ipsec.

Tnx in advance.