We have a load of store PC's still on Windows XP and running IE 8. All of these stores have the same PCs, specs and are all on our network range of 172.16.0.0/16. They all have the same applications, so it won't be another application taking up port 443. Also, our Watchguard firewall is set to permit all of these stores out to the same places. So whatever store 1 can access, store 2 can too.
The company we work with have made changes to their SSL certificates on their website recently and some PC's are able to access the actual IIS 7 page when accessing with HTTPS. And a load of other PC's are unable to reach the IIS 7 page.
My question is this: what on earth can I go back with to the guys who own the web servers? Can I ask them to make certain changes? Is there a binding issue somewhere?
Any diagnostics you can offer would be great.