I can no longer access my company's web based portal through a tethered laptop. All other web pages work. Has anyone experienced anything like this? It's a verizon problem for sure since I can get to it from every other method...
It could very well be Verizon where you're able to access from your home PC. But have you tried looking into the Laptops operating system Device Manager to see if that gives any indication of anything, like perhaps possible network driver update?
Actually you might want to be looking at Network adapters in the Device Manager of the Laptop.