I have an Outlook Add-In installed on a customer's system that consumes a web service hosted on a web server in my network. The user is getting this error when attempting to use the Add-In: Web Acceleration Client Error (514) - Proxied HTTPS Request Not Supported.
Another user in the same office can use the Add-In without any problems. Both systems are out of a home office using a residential ISP.
I have already compared the two systems and cannot identify any significant differences. I can browse to the web service on both systems with no problems. I have already checked the firewall and the virus scan on the system that is not working.
The same Add-In is running on two additional systems on another network without problems. What are the recommended next steps for resolving this issue Help! Thanks in advance!