Old posts seem to have been migrated from the Answers forum to Microsoft Q&A. I don't know exactly how the migration formula looks like. What I've noticed is that the posts have been anonymised when migrated here, so you cannot search for your alias.
As for notification options, there are plentiful on Microsoft Q&A. Click your avatar in the upper-right corner and select Settings. Scroll down a bit to find Manage email preferences and then Q&A Preferences. There you find a plethora of notification options.