518288 – Outlook: Support for Storing S/MIME Certificates in Contacts in New Outlook

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check before: 2026-03-01

Product:

Outlook

Platform:

US Instances, Windows Desktop, World tenant

Status:

In development

Change type:

Links:

Details:

The new Outlook will now allow users to store S/MIME encryption certificates within their Contacts. This enables users to save certificates directly in contact entries and use them to send S/MIME encrypted emails to the contacts. #newoutlookforwindows

Change Category:
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Scope:
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Release Phase:
General Availability

Created:
2025-11-17

updated:
2025-11-17

Docu to Check

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MS workload name

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summary for non-techies**

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Direct effects for Operations**

S/MIME Certificate Management
Without proper preparation, users may face difficulties in managing S/MIME certificates, leading to potential security risks and inability to send encrypted emails.
   - roles: IT Support, End Users
   - references: https://techcommunity.microsoft.com/t5/outlook-blog/outlook-support-for-storing-s-mime-certificates-in-contacts/ba-p/3701230

User Experience with Email Encryption
Users may experience confusion or frustration if the new feature is not properly communicated, leading to improper use of email encryption and potential data breaches.
   - roles: End Users, Compliance Officers
   - references: https://www.microsoft.com/en-us/microsoft-365/blog/2023/10/01/introducing-new-outlook-for-windows/

Configutation Options**

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explanation for non-techies**

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** AI generated content. This information must be reviewed before use.

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Last updated 3 weeks ago ago

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