Hi destiana syifa,
Thank you for reaching out to us on the Microsoft Q&A platform.
It looks like you're encountering the AADSTS16000 error. This is a common issue that occurs when trying to sign in to the Microsoft Entra admin center using a personal Microsoft account that isn't linked to a directory.
Reason:
When you log in to the Azure portal using a personal Microsoft account, by default, you are automatically logged in to the Microsoft Services tenant. As it is a default tenant with no directory, you cannot create a new user or group or create a new enterprise application, so administrative tasks can't be accomplished. To achieve this, an administrative access on a proper tenant is required.
Solution:
To resolve this, you will need to create your own tenant instead of using the default Microsoft Services tenant.
Here’s how you can do that:
1.Open an InPrivate/Incognito browser window (to avoid Single Sign-On issues).
2.Visit Azure Free Account to create a new Azure account.
3.When you create a new tenant, you will automatically become the Global Administrator, giving you full access to all administrative options.
Alternatively, if you prefer to access the Entra admin center using your personal Microsoft account, you can invite your account as a guest user in an existing Azure tenant. Follow the steps in this guide: Add Guest Users and assign the Global Administrator role to your account.
Once your personal Microsoft account is added to an Azure tenant and you accept the invitation via email, you can also create your own tenant using this link: Create a New Tenant.
Hope this helps! Let me know if you need further assistance
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