What is the correct method for adding a user to Intune?

The method of adding a user to Intune involves logging into the appropriate portal, specifically portal.office.com, with valid admin credentials. This is because Microsoft Intune is integrated with Azure Active Directory, and the user management capabilities for Intune are typically accessed through the Microsoft 365 admin center or Azure portal.

Once logged in with admin credentials, you can navigate to the user management section to add new users, assign licenses, and configure their roles related to Intune. It's essential for admins to have the necessary permissions to perform these actions, which is why using admin credentials is a requirement.

The other options don't align with the standard practices for managing users in Microsoft Intune. Logging into a user management portal and submitting a request is not the direct approach an admin would typically take. Using a mobile app to add users directly is not supported as user management is primarily performed through web-based interfaces. Sending a request to the IT department delays the process and bypasses the tools and portals available for direct user management, which should be handled by administrators.