When opening a shortcut to a website it opens in http:// rather than https://

Hi

We use window 2008 DC and XP.I have a shortcut which was sent by a survey department. I copied it to all users desktop. when users double click this shortcut it opens a window with the user name and password already pre-entered. I have to say ok and it logs into the website.

We have two different users UserA(less restricted) and UserB(More restricted).The shortcut was working fine for both users and UserB was able to successfully log into the webpage.
All of sudden when user B opens the shortcut it opens the login page and when clicked Ok it goes to a http://www.testsurvey.com and says web page not available.

But when UserA opens the same shortcut it opens the same login page and say Ok it goes to https://www.testsurvey.com.  and the web page it displayed sucessfully.

So  wondering why for UserA  the webpage is opening as http://www.testsurvey.com 
rather than https://www.testsurvey.com

Any help much appreciated.

Thanks