helgrimm

Whew. I solved this one. When setting up the individual shares I'd set "case-sensitive names" to "force" under SMB Security Settings. I vaguely remember thinking that would help avoid problems. I didn't know what I was doing. Reading the help actually sounds like it's a good thing for new shares. Changing it to "auto" immediately gives me the expected access to all the files in all of my shares.
 
Hooray!

Thanks for replying to my post it's well appreciated.
 
I have only a few days of experience with Unraid and I think I figured out why I couldn't access the WebUI. I had no regard for whether the apps were running or not. I intuitively regarded clicking on "WebUI" as a way of starting the app and displaying its GUI in the browser.
 
As far as I can see now, if the app is actually started, the WebUI is also selectable from the "actions" menu button.
 
I also were not aware that the WebUI button were available from both the Dockers tab and the Main tab apart from the Apps tab where I had found it. Clicking the word and clicking the icon leads to different results and is maybe not the most intuitive design.
 
I'll observe again of course, but I think this is probably the explanation for the randomness in the availability of the WebUI function. Sometimes I had the docker app running and sometimes not. The server is brand spanking new and I'm not using it "in production" yet but merely experimenting.