As per my understanding you are facing difficulty with the package manager while working on your company intranet. To solve this issue, you may investigate the firewall setting with your IT Help Desk and whitelist the following ports and address:
- mathworks.com
- licensing.mathworks.com
- login.mathworks.com
- services.mathworks.com
- TCP ports 80 and 443
Also, you can refer to this thread for more details:
Hope It Helps !!!
