"Connection Refused by server" on Synology File Station

[earthruby]

hi there, I hope to get some help...

I downloaded this image and successfully setting up using Synology Docker.

(I saw this from the log: proxy:info Proxy server listening: { address: '::', family: 'IPv6', port: 3000 }.)

however, I am not able to mount my OneDrive Business account via WebDav in File Station.

here is my config:
host: localhost
port: 3000
Path: /personal/user_domain_com/Documents
Account Name: user email address
Password: user email password

if I type in a wrong password, it will show "authentication error"
however, if I type in the correct password, it will prompt "Connection Refused by server"

any one knows how can I make it work?

appreciate your help~~