Email single use codes

[Tamf1958]

My workplace email is receiving high volumes of single-use codes which we know nothing about.

is there any way of finding out who is trying to access our email ?

[#2]

Hi Tamf1958,

Can you provide a sample-email and the email header?

[#3]

@MathieuVandenHautte 

[#4]

@Tamf1958  Hi,

What happens if there's an unusual sign-in to your account - Microsoft Support

Read this article and contact Microsoft Product Support Services immediately.

[#5]

Hi There, I've had multiple single code messages in recent weeks. I'm not too bothered about receiving the messages, I'm more concerned that someone is repeatedly trying to gain entry to our
emails.

[#6]

@Tamf1958  

No - or rather to the Microsoft account 😞