Edward,
Hope all is well and you are getting settled with Genesys Cloud.
If you want to try the new Edge, it supports Genesys Cloud WebRTC just fine and seems to be more compatible with old IE sites as well. I have switched to using it all the time.
The only other way around this would be to have a call sent to the system through a helper app that can call IE directly. This would require a bit of customization and if Edge works, then you wouldn't have to go this route.
Let us know at Avtex if we can be of any help.
Robert
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Robert Wakefield-Carl
Avtex Solutions, LLC
Contact Center Innovation Architect
robertwc@avtex.comhttps://www.Avtex.comhttps://RobertWC.Blogspot.com------------------------------