Some people couldn't see my screen

[ABJP]

During a WebEx call today, some participants could not see my shared screen but another person within my own company could.  We tried sharing the presentation (Powerpoint) and sharing the whole monitor.  My colleague and I could both share and see each other's screens, but other participants could not see.  She and I were co-hosts.  Maybe we set something up wrong? Also, the others were on government-issue computers... but we have used WebEx with them before without a problem. (Help, we have another meeting with them on 9/22/21!)

[hakankatircioglu]

Do the participants use web app or desktop application?

Some limitations for web app may affect. Below link may help you.

https://help.webex.com/en-US/article/n0rqd8g/Webex-Meetings-Web-App-Known-Issues-and-Limitations

And of course, please check the prerequisities for your network and firewall permissions.

https://help.webex.com/en-US/article/WBX264/How-Do-I-Allow-Webex-Meetings-Traffic-on-My-Network?#id_135400