I have noticed that if I delete an email from my Outlook junk folder, it doesn't seem to replicate through to my OWA junk mail folder view. However, if I empty my deleted messages folder in Outlook, after a couple of minutes and a browser refresh it disappears from the folder on OWA - junk mail still the same. So I assume there is some sort of sync issue or perhaps a config setting.
I do recall someone telling me they were having the same issue but with another folder.
Appreciate your time and comments