As an administrator, you can assign default passcode to new users.
From the customer view in https://admin.webex.com, go to .
Under the Voicemail section, select the Voicemail Passcode toggle to enable default passcodes for your organization.
Enter the default passcode with the following requirements:
Re-enter the passcode to confirm.
(Optional) For security purposes, you can set a minimum number of days between passcode changes. Select the toggle and then enter the number of days.
(Optional) You can set the number of days after which the passcode expires. Select the toggle and then enter the number of days.