I think my Microsoft account has been hacked

Hi Claus,

If you believe it to be hacked, I would recommend changing your password and enabling 2FA:

Change Password

https://support.microsoft.com/en-us/account-billing/change-your-microsoft-account-password-fdde885b-86da-2965-69fd-4871309ef1f1

Enable 2FA

https://support.microsoft.com/en-us/account-billing/how-to-use-two-step-verification-with-your-microsoft-account-c7910146-672f-01e9-50a0-93b4585e7eb4

If you cannot login I would recommend using the account recovery form:

Help with the Microsoft account recovery form

https://support.microsoft.com/en-us/account-billing/help-with-the-microsoft-account-recovery-form-b19c02d1-a782-dee6-93c3-dc8113b20c42