I followed advice about restoring a file from quarantine and to exclude it from being a target of Auto-protect, and then submitted the suspect file to Norton/Symantic. See postings here: https://community.norton.com/en/comment/7279201#comment-7279201
Now, I checked in Settings, AntiVirus, and looked at the Configuration+ to check what is shown in the exclusion list. Nothing is shown there. If I chose to exclude the file with the file's restoration, then I should expect to see something about it listed in this exclusion list, but NOTHING is shown there.
Now, in case the file really is a threat, Norton Security has no way of allowing Autoprotect to spot it again and to quarantine it; or since the item is not listed in the exclusion list, Autoprotect should not know to exclude it, in case the file really is not a threat. I am confused.