how to opt-out of annoying emails from microsoft

I got an email today titled 'Welcome to Windows 10 Getting Started Series'. I hate being pestered like this. It said in the email:
"f you’ve opted out of receiving email, you’ll only get one more in this series"
but I can't find any way of verifiying if I've opted out. I went to my microsoft account and looked all over but couldn't find anything that confirmed if I had opted out or in. I suspect ms deliberately designed it this way to make it hard to do so.
So where does one go to opt out?

The email itself should have an opt out link hidden somewhere, typically towards the end of the email. No matter what, mark the email as spam, Microsoft will hate that.

thanks for that kari, hopefully that will do it.