Exchange Server 2003 Security Hardening Guide
Using SMTPDIAG to Diagnose Exchange 2003 Related SMTP and DNS Problems
Microsoft preps real-time communications update
Best Practices in Messaging Security: Managing email security policy and regulatory compliance requirements in financial services, health care and public sector. – Interesting read, requires registration.
Update for Outlook 2003 Junk Email Filter (KB892236)
Microsoft Office 2004 for Mac 11.1.1 Update
Microsoft to buy Groove Networks