Outlook.com is saving MMS sent and received from my Windows phone

I was looking for an email in Outlook.com and noticed the Photos "Quick View" folder. When I entered it, I was surprised to see that any picture messages that I had sent or received were saved in that folder. I have a Windows phone so am aware that there is a link between emails and text messages through my Windows account, but I'm not very happy with the fact that Outlook.com is automatically accessing my text messages without my knowledge. Anyone know where I go to control these settings?