Is it normal for Microsoft to send one-time verification emails frequently?

admin

Microsoft doesn't use it much, and I started receiving one-time login requests every month. The login records were all unfamiliar addresses from foreign countries. So I changed the password that I had never used before. But there was still a request for login every two or three days, which Microsoft sent me a one-time login code via email. The email said to be assured that the code would not be leaked. What's going on here? Are we all experiencing the same thing? Microsoft has nothing valuable either.