Trusted IPs and private IP ranges

42169219 311 Reputation points
2021-03-05T22:14:05.507+00:00

Hi,

As stated in this documentation, trusted IP's can include private IP ranges only when you use MFA Server. Our company already has one installed and running.
74947-mfaserver.png

I entered one of our computer's internal IP address in the Trusted IP's section and waited for few hours to make sure everything is successfully replicated on cloud side.
74992-mfasettings.png

But unfortunately the cloud still requires a code.
74849-1226pc.png

When I tried a public IP, it worked like a charm. So question is simple - do I need additional configuration or I do something wrong?

And for second question - feature comparison says that Trusted IP's is available only with Azure AD Premium licenses. Our users already has Microsoft 365 Business Standard licenses assigned. If I want to use Trusted IP's feature, does that mean I need to assign Azure AD Premium for all users or only for global administrator?

Thanks!

Azure Active Directory
Azure Active Directory
An Azure enterprise identity service that provides single sign-on and multi-factor authentication.
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  1. Vasil Michev 71,796 Reputation points MVP
    2021-03-06T08:50:53.377+00:00

    Having an MFA server installed and running is not sufficient, you actually need to be authenticating through said server for that functionality to work. If authenticating against Azure AD/Azure MFA directly, only public ranges will work.

    2 people found this answer helpful.
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