Solution:

The following criteria must be met to schedule a meeting on behalf of another host:

• The person you are scheduling a meeting for must have a host account on the same Webex site.
  • Note:  The user scheduling the meeting does not require any meeting service types enabled for their account.
• The person you are scheduling a meeting for has granted your account permission to schedule meetings.
  • See: Allow Another Host to Schedule Meetings or Training Sessions on Your Behalf
• The person you are scheduling for has granted you delegate access to their mailbox and calendar.

To assign a delegate in Outlook:

Outlook 2016

1. Click on the File tab, then click the Account Settings button.
2. In the list that appears, select Delegate Access.
3. Click the Add... button.
4. Select the delegate's name, then click OK.
5. In the Delegate Permissions dialog box, select Editor in the Calendar drop-down list, then click OK.

1. Open Outlook.
2. Click on the Tools menu.
3. Click on Accounts.
4. In the Accounts dialog box, select your account from the left side of the screen.
5. Click Advanced.
6. Click the Delegates tab.
7. Click Add.
8. Select the Delegate's name, then click OK.
9. In the Delegates Permissions dialog box, select Editor in the Calendar drop-down list, then click OK.

Afterwards, you must specify this individual as someone who is authorized to schedule on your behalf on the Webex website.