Seemingly fake microsoft access code text message

I just got a text message from a number which my phone indicates is located in the UK, the number is +447394492883. the message:

Microsoft access code: 4380

Is this some sort of scam? I just checked my microsoft account which I hadn't logged into for a very long time (yay Linux) and it didn't show any recent activity besides my own login. Maybe this is some scam where when you call the number it is sent from you get an expensive phone bill, or maybe they made an error at Microsoft UK? Just in case I might give out an actual access token, I changed the number in the message but it was a similar 4 digit number. Not sure what to make of this.