As an administrator with full privileges, you can edit specific service licenses for individual users in Control Hub.
From the customer view in https://admin.webex.com go to Users.
Select a user, scroll down to the Licenses section and click Edit licenses.
The list of services currently assigned to the user appears.
Click Edit licenses.
Choose a service from the list on the left side.
Select the subscription to add or remove, and click Save.
If you assigned a Webex Meetings license, choose an account type to assign the user with for each Webex Meetings site, and click Save.
If you want to assign a different license to an existing external user whose status is Pending, you must first delete the user, and then add them again. When you remove all licenses from an external user, they won’t show up in the External users list anymore.
From the customer view in https://admin.webex.com go to Users, and select External users.
Select a user and click.
Uncheck the licenses, and click Save.
What to do next
Add the external user again with the license that you want to change for them.