As Salm told the Aachener Zeitung, "these four photos were part of his studio work and just artistic-nudes", uploaded from his HTC HD7 and continued that "you can see even more skin in the (German) afternoon television".
Microsoft Germany said on Monday that it assumed a malfunction and spokeswoman Miriam Kapsegger told the newspaper that "I'm assuming that there has been a technical error". The case was send to Microsoft headquarter in Redmond and is already under investigation by the Windows Live department. However, whether Microsoft analyzes user data or not was yet not be found out by the Aachener Zeitung.
I've contacted Microsoft for a feedback. Will keep you updated as soon as I've heard more!
Cheers ~ Arne