My ms account is promting me to input a code to verify my identity but I don't know where or how to get the code.

The code must come from the Microsoft Authenticator app entry that is already registered for this account. Simply installing the app is not enough; the account must be added and configured in the app, or the existing MFA registration must be reset by the organization.

Use these checks and options:

1. Check for the one-time password (OTP) in Authenticator
   • Open Microsoft Authenticator on the phone.
   • Tap the work/school account that matches the @ms.bulsu.edu.ph address.
   • Look for a line such as “One-time password code” showing a 6‑digit code that changes every 30 seconds.
   • Enter that 6‑digit code in the Enter code box on the sign-in screen.
2. If no OTP code appears for this account
   • If tapping the account in Authenticator does not show a “One-time password code”, the app registration for this account is incomplete or tied to a different device.
   • In that case, the MFA settings for the account must be reset by the tenant’s administrator or by Microsoft’s Data Protection team (for work/school tenants) so the account can be re-registered in Authenticator.
3. When locked out and unable to get any code
   • If no verification method works (no OTP in Authenticator, no SMS, no email code), the only supported path is admin or Microsoft support intervention. For work/school accounts, contact the institution’s IT/tenant admin and request an MFA reset for the account.

Once MFA is reset and reconfigured, the Authenticator account entry will show the rotating 6‑digit “one-time password code” that can be used on this screen.

References:

• Microsoft Authenticator app doesn't show 6-digit OTP code - Microsoft Q&A
• Requesting a Tenant Admin MFA Reset - Microsoft Q&A
• Common problems with two-step verification for a work or school account