Hi JJB4321,
I’m Efren. I’m an Independent Advisor and Microsoft user like you. I’ll be happy to help you out today.
It seems that your account could have been hacked and someone/something is trying to send emails using your email address.
First of all, I advise you to visit the following link:
https://account.live.com/Activity
You can also access it clicking on "Security" on the top menu under microsoft.com my account settings - https://account.microsoft.com/
Once there, you can look through the different sessions and, if you spot anything unusual, then click on "Secure my account" on that session and it will bring you to a process in order to secure your account and logout unauthorized access.
Microsoft forces you to change the password after using the feature though as this is the first step you should do in these cases.
Then, please read the following article that explains what else you can do if your account has been hacked:
https://support.microsoft.com/office/35993ac5-a...
If you are still concern about security, you can also set up Two-step verification in the following link: https://account.live.com/proofs/manage/additional
This is a user-to-user support forum and I am a fellow user.
I hope that answers your question, but please let me know if you need anything else.
Sincerely,
Efren