Because the company's proxy is blocking the update for a reason, and changing the DNS address or connecting to a hotspot could expose the company's network to security risks.
A traffic exemption is a request to allow specific traffic to bypass the company's proxy. This can be done for a variety of reasons, such as when a technician needs to download a software update or access a website that is blocked by the proxy.
To request a traffic exemption, the technician should contact their IT department and explain why they need to download the update. The IT department will then review the request and determine if it is approved.
If the traffic exemption is approved, the technician will be able to download the update without any problems.