From 

https://www.icann.org/news/blog/issues-with-adobe-connect-at-icann61

“...."Yesterday we were notified by a member of the Security and Stability Advisory Committee of what appears to be a potentially serious security issue affecting our use of Adobe Connect.

In order to protect the members of the multistakeholder community, and out of an abundance of caution, we have suspended our Adobe Connect services. This means that Adobe Connect services will not be available for the rest of ICANN61.”

Livestream and streaming audio will be available.

The security issue regarding Adobe Connect is likely the one posted by Adobe on “patch Tuesday” 

https://helpx.adobe.com/security/products/connect/apsb18-06.html

“Adobe has released a security update for Adobe Connect. This update resolves an unrestricted SWF file upload vulnerability (CVE-2018-4921), which could be exploited to conduct cross-site scripting attacks. This update also resolves an OS command injection vulnerability in the Adobe Connect URI handler on Windows (CVE-2018-4923) that could result in unintended arbitrary local file removal or forced uninstall of the application. ”

Dev Anand