Managing personal Outlook.com account settings, security, and privacy
Hello,
Based on the information you provided, it appears that the SMS verification code is not being delivered correctly, despite working without issues last month.
You mentioned that you were able to receive an OTP from another service. Could you please let us know which service or application sent the code successfully?
Also, could you confirm whether any of your colleagues at the university are experiencing the same issue? If possible, please also let us know whether you can receive other SMS messages normally.
This information will help us investigate the issue further.
I look forward to your response.