From the customer view in https://admin.webex.com, go to Services, and then click Settings on your Meeting card.
Enable Enable Webex Meeting number Prefix and Suffix and enter values for either one or both of the following:
For example, with a meeting number of
The prefix and suffix should not conflict with existing dial plan settings you have configured in your enterprise call control systems, such as Cisco Unified CM, Telepresence Video Communication Server, Expressway, or any third-party call controllers.
Make it Easy to Join Cisco Webex Meetings with Cisco Webex Cloud Registered Devices
To make it easier for users to join meetings from Webex cloud-registered devices, you can define a dialing shortcut. You define a shortcut by setting up a prefix, a suffix, or both. Users can then just enter the meeting number together with this shortcut to join the meeting, instead of entering the entire video address.