Ok, I know how to change the logo displayed in the sidebar, but because of a change made by the company that set Exchange up for us (they branded the logon page with our old logo and color) it looks like a blind spider with issues designed the page.
Basically the left sidebar is purple and I have been asked (ordered) to change it to white, trouble is I cannot find where to do this. I have looked at all the image files and trawled through the logon.css file multiple times without any luck.
The section I need to change is highlighted in the image attached (company logo has been replaced with a white box), please tell me where I go to change this to white.