The end-user experiences for CMS vs. cloud Webex are almost identical. Check out this Webex Meetings Adoption Toolkit, which contains use cases per line of business, like Sales, Marketing, IT, Human Resources, Executives/Leadership, Executive Assistant. This should help you get a good head start at scaling a company-wide adoption campaign!
Editable source files for corresponding flyers, online banners, email templates are included in the eBook.
https://ebooks.cisco.com/story/meetingsadoptiontoolkit