Hi Stalanden,
To narrow down the issue, I'd like to collect the following information first:
1. No - I think there is a problem on the Windows 8 App
2. Yes - I have tjekt all the names og servers - to make sure that the setup on Windowes mail is 102 % indentical with Iphone
3. I am the fist to try the Windows 8 App - all others are working with Apple og Androids
stålanden