You may get an error if you're trying to add users who used their e-mail address to create a trial account. Have the users delete their organization first before adding them to your organization.
If you have an Active Directory and use Cisco Directory Connector when you manually add people in Control Hub, you must also add them to your Active Directory.
Cisco Webex Contact Center doesn't support Active directory.
When adding users, first and last names must not include extended ascii characters or the following characters %, #, <, >, \, /,", and have a maximum length of 30 characters.
From the customer view in https://admin.webex.com go to Users, and then click Manage Users.
Select Manually Add or Modify Users.
(Optional) If you automatically send welcome emails, then click Next.
Choose one and click Next:
(Optional) If you added Calling to the user, assign a location, phone number, and extension.
Review the summary page of records processed, and click Finish.
What to do next
You can assign administrative privileges to people in your organization.