McAfee TrustedSource blocks iCloud

My employer's web filter relies on McAfee TrustedSource to cancel out unwanted traffic. However, it classifies iCloud as "Personal Network Storage, Interactive Web Applications". This means no access to iCloud is granted from our computers whereas Hotmail, Gmail etc don't give any problem at all, even though there is at least in part web storage available on those as well.

I tried requesting a category change with McAfee once before but to no avail. Does anyone else have an idea how to tackle this, or, if Apple people read this, some political pushing would be great It's very annoying that I cannot acces my webmail whereas people with pretty much any other provider have no such issues.

Thanks!