s/mime encryption

The s/mime encryption tag covers Microsoft’s recent additions for certificate-based email protection in the new Outlook for Windows. Tagged coverage focuses on two Microsoft 365 roadmap developments reaching General Availability in May 2026: storing S/MIME certificates in Outlook Contacts and looking up S/MIME certificates through LDAP directories. These capabilities are intended for desktop users in Worldwide and GCC environments and address important functionality for organizations that rely on signed or encrypted email. The coverage also places the changes in the broader transition from classic Outlook to Microsoft’s web-backed Windows client, highlighting how certificate management and directory integration are helping close security-related feature gaps.