Use Slido in Webex Webinars

  • 20 January 2022
  • 1 reply

Userlevel 3

You can use Slido live polling and Q&A directly in Webex Webinars (formerly Webex Events new) with our seamless integration. It’s currently available for up to 10,000 attendees, 5,000 if you’re using quizzes. 


Good news! Slido is now available also in Webcast mode in Webex Webinars for up to 10,000 participants.


 In this article: 


Essential Requirements
  • Slido needs to be approved and enabled in the Webex Control Hub by a full Webex admin
  • Webex Webinars app version 41.9 or later
  • The following domains need to be allowed in your network firewall:,, *,, *,
Current Limitations of Webex and Slido integration:
  • Slido is available for hosts and panelists (if they’re managing Slido) on Webex desktop app only: they need Webex Webinars on Windows or macOS.
  • Webcast mode for over 10,000 participants is not yet supported
  • Webex Events (classic) are not supported
  • Collaborators in Webex Webinars have to be a panelist and use Webex desktop app to see Apps
  • Internet Explorer 11 not supported
  • Space meetings are not supported
  • Webex shared devices and personal devices for hosts are not yet supported
  • Not available for FedRAMP and end-to-end encrypted meetings
  • Post-event Slido Analytics are not available in Control Hub
  • Ideas feature not available



Schedule a Webex Webinar


To start: 

  1. Log in to your Webex platform (e.g. and click ‘Schedule a webinar’:
Scheduling a Webex Webinar


  1. Then, fill out the information about your webinar and click ‘Schedule’ once finished.


Filling in your webinar’s details



Set up and run Slido during your webinar

You can prepare your Slido in advance at‘Log in with Webex’, enter your Webex credentials and create your Slido

Alternatively, you can set everything up on the day of the event directly in Webex:

  1. Open the Webex desktop app and continue to ‘Apps’
  2. Click Slido
  3. Select your existing event or create a new one
Launching Slido in Webex before or during your webinar or webcast


Once you’re in, create your polls or turn on moderation of questions if preferred. Creating and managing polls and Q&A during your webinar is similar to how it’s done in Webex Meetings. The visual guide below will walk you through it:


Please note that the ‘Apps’ button and Slido are not available in webinar practice session. It will appear once you’re live. 


Your participants will be able to interact with Slido directly in the sidebar once you open it via Apps. 

Slido in webcast mode from a participant point of view



Have a collaborator help you managing polls and Q&A

To help you activate polls and moderate submitted questions, you can add a collaborator to Slido. Collaborators need to have a panelist role in Webex Webinars to be able to see Apps. 

As the Webex webinar host, you should be the first one to open Slido via Apps > Slido during the webinar. Collaborators also need to open Slido via Apps > Slido to be able to help with polls and Q&A. 


Read the article below for more details about the Slido and Webex roles: 


The following articles explain more about Webex Webinars and the difference between a running a Webex Webinar in a webcast mode for the audience and without it.


Frequently asked questions

  • Can I use Slido for webinars over 10,000 participants? 
    At the moment, Slido is only supported in Webinars for up to 10,000 attendees. We’ll introduce Slido multiple choice poll for bigger webinars in early 2023.  



Curious about learning more? 


1 reply


Hey @Slido Team,
today we have a fantastic experience with the PowerPoint and Webex Integartions. Thumbs up.

However yesterday I had a Webex Webinar with Slido polling, initiated through PowerPoint which did not work correctly.


  • I’ve prepared a Slido polling within the web interface and shared it to the Webinar host
  • The Webinar host started the Webex Webinar and activated the Slido polling
  • I started to peresent my PowerPoint slide as panelist
  • When coming to the Slido integrated slide the Slido polling started (host could see it) BUT the Slido sidebar did not come up on participant side and was not possible to show manually
  •  This was the case for the participant Desktop- and Webclient
  • Workaround: The host stopped the polling while my Slido slide was up and started it

I am able to replicate this.

It is working if I as the panelist use the host login in the PowerPoint Integration. 

It seems that ONLY the host is able to initiate the polling / sidebar not the panelist.

Best Regards,