Send S/MIME or Microsoft Purview encrypted emails in Outlook
When you need to protect the privacy of an email message, encrypt it. Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text.
Open encrypted and protected messages - Microsoft Support
Learn how to identify and open encrypted and protected emails no matter what email client you're using.
Learn about securing and protecting email messages in Outlook
Encrypting an email message means it's converted from readable plain text into scrambled cipher text. Only the intended recipient can decipher the message for reading.
Send encrypted messages with a Microsoft 365 personal or family ...
If you have a Microsoft 365 Family or Microsoft 365 Personal subscription, Outlook includes encryption features that let you share your confidential and personal information while …
Set up Outlook to use S/MIME encryption - Microsoft Support
Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text. Only the recipient who has the private key that matches the public key …
Introduction to IRM for email messages - Microsoft Support
Information Rights Management (IRM) allows you to specify access permissions to email messages. IRM helps prevent sensitive information from being read, printed, forwarded, or …
Sign in to view your Microsoft 365 encrypted message
Sep 15, 2014 · If you've received an encrypted message from an organization that uses Microsoft 365 Message Encryption, you can sign in with a Microsoft account or with the work or school …
Fixes or workarounds for recent issues in new Outlook for Windows
Last updated: October 2025 For issues that are not covered on this page, we have multiple tools to help you automatically diagnose and fix a range of Outlook problems. Outlook Known …
Send a digitally signed or encrypted message for Mac
When you need to protect the privacy of an email message, encrypt it. Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text.
View certificates - Microsoft Support
Outlook uses certificates in cryptographic email messaging to help keep communications secure. You can view your own certificates or those that you receive in email messages.