Your Webex service will be upgraded to the Latest release 43.4 according to the Cisco Webex maintenance schedule.

Summary of the upcoming release is below. 

Webinar and webcast experience

• Beginning April 1, 2023, you can no longer use Webex Events (classic) to schedule webinars, you must use Webex Webinars instead. If you have any scheduled events with Webex Events (classic) that start on April 1, 2023, or later, you can still start, manage, and cancel those events. However, you cannot change the date and time to be April 1, 2023, or later.
  For more information, see Get started with Webex Webinars and Compare Webex Webinars and Webex Events (classic). 

• Webex Events (classic) recordings are retained in Webinars even after the migration to Webinars. Webex Events (classic) recordings are synced to the new view of recordings in Webinars after Webex Events (classic) is no longer available. The content of these recordings doesn’t change, however, the look and feel are upgraded to include some of the brand-new features that Webinars have to offer.

• Attendees can join a webinar once using one email address. Allowing only one join per email prevents uninvited attendees from using an email address that has been approved or invited to join the webinar.

• Webinars now support multiple polls at a time: attendance, registration, and survey data are all in one report. Webinar hosts and cohosts can now launch multiple polls during their webinar. This only applies to polling and not Slido. Completed webinars now include a new report in the Activity tab called Reports summary which combines attendance, registration, and survey data all into one .csv file. This report is visible once all three reports - attendance, registration (if applicable), and survey (if applicable) are generated.

• Webinar presenters can open and share an MP4 file to attendees during a webinar. This is an alternative way to share a video.

• Host and cohost are to have the same privileges on webinar report page. To empower collaboration, cohosts can now access and download the same reports as the host from the webinar report page. Both hosts and cohosts can see the same tabs on the reporting page including attendance, registration (if required), survey (if any), activity (if any), recordings, and insights. Cohosts can only view reports if they are in the role of a cohost when the webinar ends. Cohosts who didn’t join the webinar or whose role is changed to attendee or panelist during the webinar can’t access these reports.

• Webex streaming hosts and panelists can list, search, and expel attendees. Webcast hosts, panelists, and cohosts can now view the attendee list in webcast view, search for attendees through that list, and expel attendees from the webinar in webcast view using the list.
  This feature is available on a delayed release cycle. Check status.webex.com/maintenance to see when it’s available on your site.

• A new Audio Watermarking option is available when scheduling meetings based on the type of Webex Meetings Pro-End to EndEncryption_VOIPonly. When enabled, the meeting audio includes a unique identifier for each participant. The site administrator can upload audio recordings to Control Hub to identify the source that was recorded based on the presence of a unique audio watermark identifier. This feature uses the organisation’s detailed meetings data to associate to the unique audio identifiers. The length of retention for the detailed meetings data will determine the length in which Control Hub can lookup unique identifiers for analysed recordings. Audio recordings should be at least 100 seconds in length to be analysed. Information is only provided for recordings hosted by the organisation that is analysing a recording. Recordings uploaded for analysis are deleted as soon as this analysis is complete.

Go here for more details on what's new in the 43.4 Latest release.

• Review the above features and inform your users.
• Follow 'Next steps' below.