Error Message in IE-11 when Joining a Connect Meeting

Appending ?launcher-false to any Meeting URL will open the Meeting in the standard browser Flash Player rather then in the Connect Meeting Addin. IE11 users who attempt to launch a Meeting in the browser may run into the following error:

Clicking cancel does not help:

It loops back the Meeting Addin installation option:

The following message appears for IE11 clients who have local admin privileges:

Adding the Connect domain to the trusted sites list in IE11 resolves the issue as does switching to a different browser.

The Microsoft blog article on the topic suggests:

• Internet Explorer will only warn you once per tab process about out-of-date Flash ActiveX control blocking. All subsequent out-of-date Flash ActiveX controls will be allowed.
• Users who are not members of the Local Administrators group on the client PC will not see any out-of-date Flash ActiveX control blocks.

Read more at https://blogs.windows.com/msedgedev/2016/09/13/blocking-out-of-date-flash/#PFB6vKUIzPJQgHcL.99