EX2 and Webdav

Since WD isn’t supporting my MS Lumia 950XL and stopped supporting WD2go app, i am trying to setup Webdav.
But i always running into rights error, ports 8080 and 4443 are open in my router, webdav is enabled in Shares and setting >Network.
Get the same error with Windows PC using Netdrive and on my Lumia 950XL using sharefolder app.
Tried the username from users, tried email adress as username.
What am i missing?

Hello there,

Please check on this post, see if you can find some helpful information on this matter:

Did found that one, but didn’t worked for me.
But txs for trying to help.