Can I disable getting a notification on a page or for a user for "Task marked complete" only?
Sometimes pages contains many of these for personal use, task lists etc. and sometimes this can be to annoying for others. As a result they end up removing themself as watcher, ending up missing valuable changes.
unfortunately the official documentation describes that is only possible to switch on/off completely. The administration UI does not provide a more detailed "switch". Sorry. 
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