Cannot access microsoft over an internet connection by using the proxy to the office

Recently I can no longer access the Web site from microsoft, or support for microsoft over an internet connection in my office who uses a proxy server, so that the automatic systems update windows could not work well, and the bases of microsoft security might not regularly to update the definitions of viruses and spyware.
However, if I use an internet modem usb connection, then all problems can be solved, in my laptop, which means no protection of microsoft access. But when I use the internet connection via a USB modem, I can't connect to the local network in my office.

I already check on the filter of the proxy server and there is no protection of access to microsoft.
Why this happens and what I can do to get access to microsoft through the Internet using a proxy server in my office?

Thank you.

Hi Juli,

Thank you for your response.
This problem is better suited in the forum TechNet that we have a dedicated team with advanced tools and permissions to help you with such questions. I suggest you post the same question in the Microsoft TechNet forum for more help on this issue.
https://social.technet.Microsoft.com/forums/Windows/en/home?category=w7itpro

Tags: Windows

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