I'm not sure which UNC share we try to hit while testing, but it's possibly the LDMain share. You'll just need to put in credentials that will work for whichever shares you're using it for.
HTTP should be working to our standard shares (ldlogon, landesk/files, etc.), but not any new shares you've made. You would need to go into IIS and add those as web shares yourself.
Hmm, I tried ldmain but the test still fails. I only want it really for provisioning and HII.
I managed to configure HTTP myself (our package share lives outside of the normal structure so I guess that is why I had to do it myself) - the test for HTTP now says successful, and I can web browse to the drivers, but HII for example still doesn't work.
I have managed to work out why the tester failed - it is unable to handle fully qualified names.
Under 'Preferred server properties' and 'Configuration', I was entering 'Server Name' as servername.domain.com because we have several international sites and I always try to fully qualify where possible. When using this config, the 'Test credentials' failed for UNC. If I just use 'servername' without the suffixes, the test passes. I will investigate further as to whether HII now works.