First Steps: Configuring Exchange Online Protection
How to Enable the built in Anti-spam with Exchange 2010 | Tech Help Blog
Better Spam Filtering with Exchange Online Mail Flow Rules
Exchange 2016 Anti Spam
How to change spam settings on Exchange 2007 / SBS 2008 to enable some / all / more spam to be delivered to an account for analysis - David Overton's Blog - DavidOverton.com
Email Spam Filter for Exchange
Company Exchange Server Spam filter
Optimize Antispam Settings in Office 365 - Azure365Pro.com
Set Up Exchange Online Protection For Spam / Malware Filtering For Your On-Premises Exchange Server