"connection is not private" means you need to install a good SSL certificate on your IIS server.

Thanks Jay.  I'm not knowledgeable on these matters regarding SSL certs so forgive my ignorance.

Prior to the upgrade, I was using Http://<servername>/sage300 from the workstation without issue.  Now, your saying I have to get a SSL cert for the server and use https://<fqdn>/sage300.  This would then take me outside and then back inside to my server.  Staying inside is not possible anymore??  Or am I missing something here?

Hi Terry - did you update the two web.config files in the Online/Web and Online/WebAPI?

I assume you mean to allow the Admin user and change localhost to servername.  Yes, I did.