MT SSTP client to Softether server

RouterOS General
1

Hi, dear Mikrotik community!
Did anyone managed to establish a tunnel to Softether server (with SSTP enabled) using MT SSTP client? I was able to connect to server using Softether’s own client, but MT fails to connect with authentication failure

sstp: rcvd CHAP Failure id=0x0
...
sstp: sent LCP TermReq id=0x6
    failed to authenticate ourselves to peer

UPD: Failed to connect both using user/password and certificates.

2

Still could not connect to Softether by certificate, but successfully connected by username and password. It appears that username should be specified in format

username@virtual_hub_name