So i've been at this for a while now but i cannot get it working.
I can access the share from my gateway PC using unc-path \\desktop\share using credentials with no pc name or workgroup in the username.
When using the connector in a flow i get the following error message:
The dynamic invocation request failed with error: { "status": 400, "message": "The requested action could not be completed. Check your request parameters to make sure the path '' exists on your file system.\r\nclientRequestId: e0e66bd3-2529-30fc-5c1f-3429a6230f12", "error": { "message": "The requested action could not be completed. Check your request parameters to make sure the path '' exists on your file system." }, "source": "filesystem-we.azconn-we-002.p.azurewebsites.net" }.
Connector is set up with the unc path and username as mentioned (using any other combination, like with desktop\user fails with an other error message than this one.