My Activity Feed and the Activity Feed bell icon for my shared library disappeared after the most recent update–EndNote 20.5 Bld16860 on Windows 10.
Was this feature removed? I used it quite a bit to track actions from other users in my shared library.
If it is any help I am on Win10, I upgraded from X8 to V20.5 on the same build and I have the same as you: “Sync now” and “refresh status” no bell icon. So you are not alone in not seeing it.
EDIT whilst searching for something else I came across this inthe help fopr V20. It seems there should be an activity bell icon…
Not on mine on Win10