Hi Alex,

Thanks for your feedback. The final version of the Live Sharing Service will effectively only use port 443, that was indeed one of the requirements for this service, so that we can prevent situations like you currently experience.

But unfortunately it was not possible to already make this available for the preview version of this service. It is a preview with certain limitations, and a lot of work is still being done behind the scenes to make even more solid and secure in the final version. One of those limitations is that you are currently redirected to a custom port and this cannot be changed in that preview version.

So, today you won't be able to access those shares from behind that firewall, but you will be able to do so on other networks or with the final version of the Live Sharing Service.

Bert