How Windows OS follow the proxy of Mac OS

Hi,

my company staff need to click proxy in windows IE proxy setting everytime when they are in office and out of office.
we can configure the proxy in mac os and location. so they just need to choose the location only and it will get the proxy and remove proxy automaticly.
however, in windows OS, we need to do 1 more step to remove the proxy from IE to make it work.
may i know does any way to dont setup the proxy inside windows IE. and the parallels can follow the proxy of Mac OS?

 

Problem encounter:

We are using proxy in our company and we need to activate/deactivate the proxy from IE when we were using windows OS Laptop.

We have change the MacBook pro with Parallels Windows 7 pro OS recently.
and i can setup the MacBook proxy in network preference and i can choose the location to activate/deactivate the proxy.
however for the windows OS, we still need to activate/deactivate the proxy from IE again.
our users always confuse on this part.
can we ignore the additional setting from IE and just follow the mac network preference setting.
when they change the location in mac network preference, the windows proxy also follow the setting?