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Number of registered Phones limit for Azure MFA

NITIN GUPTA 1 Reputation point
2021-08-25T12:10:40.517+00:00

Hope you're all doing well!

I have a quick question, can we change the limit of number of MFA registered phones for AAD user.

I know default is 5.

Is it possible to alter that to limit down to 1 or increase and how?

Thanks in advance!

Microsoft Security | Microsoft Entra | Microsoft Entra ID

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  1. Marco Gerber 36 Reputation points
    2021-08-26T21:08:51.977+00:00

    Hi @NITIN GUPTA , I guess it's currently not possible to limit the number of devices in the MFA service itself. Although, when registering a Microsoft Authenticator app, Azure adds the device to the user as "Azure AD registered". You could set the maximum number of devices per users in general under "Azure Active Directory" > "Devices" > "Device settings". But keep in mind that this setting also includes other device join type like Hybrid- or Azure AD joined.

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