Information
Joining or registering devices to Microsoft Entra ID should require Multi-factor authentication.
Rationale:
Multi-factor authentication is recommended when adding devices to Microsoft Entra ID. When set to Yes, users who are adding devices from the internet must first use the second method of authentication before their device is successfully added to the directory. This ensures that rogue devices are not added to the domain using a compromised user account. Note: Some Microsoft documentation suggests to use conditional access policies for joining a domain from certain whitelisted networks or devices. Even with these in place, using Multi-Factor Authentication is still recommended, as it creates a process for review before joining the domain.
Impact:
A slight impact of additional overhead, as Administrators will now have to approve every access to the domain.
NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Solution
From Azure Portal
From Azure Home select the Portal Menu
Select Microsoft Entra ID
Select Devices
Select Device settings
Set Require Multi-Factor Authentication to register or join devices with Microsoft Entra to Yes
Default Value:
By default, Require Multi-Factor Authentication to register or join devices with Microsoft Entra is set to No.