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

Originally posted by Microsoft Oct 28, 2025 Uncategorized 0 Comments

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

Product Outlook
Release phase General Availability
Release date April CY2026
Platform Desktop
Cloud Instance Worldwide (Standard Multi-Tenant), GCC
Created 2025-10-27
Roadmap ID 518287
Roadmap Link https://www.microsoft.com/microsoft-365/roadmap?id=518287

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Joao Ferreira

I've been working with Microsoft Technologies over the last ten years, mainly focused on creating collaboration and productivity solutions that drive the adoption of Microsoft Modern Workplace.

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