Dear @rick crawford,
Thank you for reaching out to the Microsoft Q&A forum. I am happy to assist you.
Microsoft may block a sign‑in when it detects activity from a new device, a newly installed application, or a different geographic location, such as when you are traveling. This security measure is designed to protect your account in case someone else attempts to access it. To regain access, please follow the instructions shown on the sign‑in screen, choose where Microsoft should send the verification code, and enter the code to unlock your account.
For more details, please refer to the following article: What happens if there's an unusual sign-in to your account
You can also visit https://account.microsoft.com/security, sign in, and review your Recent activity. Check any sign‑in attempts marked as unusual. If the option is available, select “This was me” to confirm legitimate activity.
Additionally, we recommend setting up Multi‑Factor Authentication (MFA) to enhance the security of your account. After MFA is enabled, you will be prompted to verify sign‑ins through the Microsoft Authenticator app instead of receiving frequent alerts.
Here is the setup guide: How to add your accounts to Microsoft Authenticator – Microsoft Support Since I do not have access to your account environment, there may be cases where my recommended solutions do not fully resolve the issue or other problems appear. If that happens, please update me right away with any new details or results in the Comment. I will do my best to support you and help find a solution as quickly as possible.
I hope this information is helpful. If you need any further assistance, please feel free to reach out. We are here to help. Thank you very much for your understanding and cooperation.