M365 Archive

RM518287 - Outlook: LDAP directory support for S/MIME in New Outlook

Microsoft 365 Roadmap

Roadmap ID

518287

View in M365 Roadmap

Status

In development

Release

General Availability

Last Updated

Apr 13, 2026

Published Oct 27, 2025

Platforms

Desktop

Service

Outlook

Tag

In development
General Availability
Worldwide (Standard Multi-Tenant)
GCC

Cloud

GCC
Worldwide (Standard Multi-Tenant)

Summary

The new Outlook now supports LDAP (Lightweight Directory Access Protocol) directories for sending S/MIME encrypted emails. This allows users to add an LDAP directory in the new Outlook and use it to fetch recipients’ certificates from the configured directory when sending S/MIME encrypted messages. #newoutlookforwindows

Description

The new Outlook now supports LDAP (Lightweight Directory Access Protocol) directories for sending S/MIME encrypted emails. This allows users to add an LDAP directory in the new Outlook and use it to fetch recipients’ certificates from the configured directory when sending S/MIME encrypted messages. #newoutlookforwindows

GA date: June CY2026