MFA in Indonesia Country code 62

Vincent Diaz 1 Reputation point

Hi All,
Dumb question...I have a user that lives in Indonesia Country code 62. He has a work number that has 9 digits and a personal mobile that has 11 digits.
We can get MFA thru to the 11 digit mobile, but not to the 9 digit mobile.
Is there something different about O365 MFA and mobile number length differences?

Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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  1. Dillon Silzer 54,831 Reputation points

    Hi @Vincent Diaz

    I'm not quite sure about Indonesian Country codes and I don't see any documentation on this, but you could use/allow MS Authenticator in your tenant.

    The phone number (9 digit) may just be an non-supported format for Microsoft.


    If this is helpful please accept answer.

  2. Givary-MSFT 28,576 Reputation points Microsoft Employee

    @Vincent Diaz

    Thank you for reaching out to us. As I understand user unable to perform MFA when he uses 9 digit work phone number ( within Indonesia ). At the time of issue do you have sign in logs/correlation id in Azure AD portal at the time of issue ( performing MFA using 9 digit work number ) so that we can investigate further at our end.

    Did you check with other users as well having similar work number also facing the same issue ?

    I would agree to @Dillon Silzer comment as well to use Authenticator App for performing MFA till we investigate this issue.

    Let me know if you have any further questions.

  3. Vincent Diaz 1 Reputation point

    HI Givary,
    Thanks for asking. Per the user the voice call also does not come through either.
    We switched him to his personal 11 digit personal mobile number for MFA and both voice and text work.

    Here is correlation ID for one of the failed MFA transactions: 8b0e0552-0cc3-4001-a9eb-41a61ab54b83


  4. Vincent Diaz 1 Reputation point

    Hi Givary, what's the best way to get you the time stamp data you are looking for?

    I did a copy of the top of the Activity Details page, LMK if you need something more specific and best way to capture it.

    9/23/2022, 8:33:24 PM
    Request ID
    Correlation ID
    Authentication requirement
    Multifactor authentication
    Continuous access evaluation
    Sign-in error code