On November 1, 2016, Microsoft will stop with supplying new updates to the Junk E-mail Filter (also known as SmartScreen) for Outlook and Exchange.
The Safe and Blocked Senders lists and the International Filter will continue to function as before but the Junk E-mail filter itself will become less effective as definitions will age. Eventually, Microsoft will remove the filter entirely from future Outlook and Exchange versions.
For most scenarios, this might actually sound more dramatic than it actually is; You might already be using a superior Junk E-mail Filtering solution without realizing it.
Continue reading: No more Junk E-mail Filter updates for Outlook and Exchange