Hi,@Iniobong Nkanga
Thanks for posting your question in the Microsoft Q&A forum.
I will answer your questions in turn:
- They want to know how to encrypt email message on outlook.
Microsoft officially provides how to set up encrypted emails: Set up Microsoft Purview Message Encryption | Microsoft Learn
- Outlook does not show the sensitivity labels.
Regarding sensitivity labels, you need to verify that the sensitivity labels have been published in the Microsoft Purview Compliance Portal.
You can refer to this link: Sensitivity labels are missing - Microsoft 365 | Microsoft Learn
If my answer is helpful to you, please mark it as the answer so that other users can refer to it. Thank you for your support and understanding.