Configuring preferences and options in Outlook.com
I am getting the very same message with the exact number as mentioned in your account , "6.7GB, I am 134% over capacity (5GB)". yet when I select manage account, I see that I am only using 131mb out of 5GB...an under this, there is a message saying that I have 15GB of email storage...this is a generic message they are sending to everyone, regardless if you are over the limit or not, it is very deceiving to say the least