s/mime encryption

Microsoft marked Microsoft 365 Roadmap ID 518288 as launched on July 6, 2026, confirming that the new Outlook for Windows can now store S/MIME encryption certificates inside Contacts for desktop users in Worldwide and GCC tenants. The feature reached General Availability in May 2026, but its...

Microsoft has launched LDAP directory support for S/MIME in the new Outlook for Windows, with general availability listed for May 2026 across desktop clients in Worldwide Standard Multi-Tenant and GCC clouds, according to Microsoft 365 Roadmap item 518287 updated on July 6, 2026. The change...