After I sign in to my Outlook account, I am seeing a strange string of letters and numbers below my profile ID, for example (see also attached screenshot):
My account name: Default-54914b26-XXXX-XXXX-XXXXXX@SCT-15-1-485-9-msonline-outlook-3c171.templateTenant
With regard to this issue, my questions are:
What is the meaning of this script/string? Is it some kind of certificate or encryption key to my account?
Is it indication that my account has been hacked?
Also, if you look closer at the screenshot I attached, you will note that my Outlook account no longer displays the green-lock icon (at top left of the screen), which normally signal a secure connection.
I have very strong feeling that this account has been hacked.
I contacted MS support team and multiple security experts, but no one has an explanation for what this is.