This is very weird. I had a passport.net account with Microsoft from 2010. Obviously that service has long since been discontinued.

Today I received this legitimate email from MS to that account saying my storage is full.

But when I try to sign into MS, it doesn't recognise the old account.

I am 100% sure this isn't spam. It comes from MS, only links to their website, passes SPF, DKIM, etc.

I wonder which old service is gradually filling up? How on earth can I sign in?

#Microsoft