I have been waiting for this feature and still nothing. Then the Action Center broke the functionality it did have. My work email has an Inbox with a host of subfolders that have rules applied to them. Currently I'm only notified if a mail comes to my Inbox. I have to manually check to see if mail has arrived to the subfolders. Technically, if a folder is synched it should benefit from alerts and action center. Previous to 8.1 I got around this by pinning the subfolder to the Start screen. This doesn't scale well when you have multiple folders that you want to be alerted on. However, it was a workaround. Now that Action Center is here I'm no longer alerted when there's a new mail in the subfolder. Is this a bug? If it is, just add subfolders to Action Center and l'd be golden. IOS does this and it works fine. Plus I don't want a tile for every subfolder. I just want an alert in the Action Center. Make sense?