To enable security for WebEx Teams users, follow these steps: 1. Access the WebEx Control Hub. 2. Navigate to the 'Users' section. 3. Select the user or group you want to secure. 4. Go to 'Security Settings'. 5. Enable the desired security features, such as two-factor authentication or data encryption. 6. Save the changes to apply the security settings.

To transition users from CUCM to WebEx Teams with encryption enabled, follow these steps: 1. **Assess Current Setup**: Review the current CUCM configuration to understand the encryption settings and user requirements. 2. **Plan Migration**: Develop a migration plan that includes timelines, resources, and a step-by-step process for moving users to WebEx Teams. 3. **Configure WebEx Teams**: Ensure that WebEx Teams is set up with encryption enabled. This includes configuring the necessary security settings and policies to match or exceed the current CUCM encryption standards. 4. **User Training**: Provide training sessions for users to familiarize them with WebEx Teams features and the importance of encryption. 5. **Pilot Testing**: Conduct a pilot test with a small group of users to ensure that the transition is smooth and that encryption is functioning as expected. 6. **Full Deployment**: Once the pilot is successful, proceed with the full deployment, migrating all users to WebEx Teams. 7. **Monitor and Support**: After migration, monitor the system for any issues and provide ongoing support to users to ensure a seamless transition. 8. **Review and Optimize**: Regularly review the setup to ensure that encryption remains robust and make any necessary adjustments to improve security and user experience.