Application Level Permissions missing for Power BI Rest APIs in Azure

Hi Nipun0801 

You're trying to automate Power BI tasks using the REST API via an Azure AD app registration, but you're encountering a roadblock because application-level permissions (App-Only) like Dataset.ReadWrite.All and Workspace.ReadWrite.All aren't appearing under "Application Permissions" in your Azure portal. Instead, you're only seeing delegated permissions, which require a signed-in user context. This issue arises because, although you've taken the correct preparatory steps—including enabling "Allow service principals to use Power BI APIs" in the Power BI Admin Portal, registering your app in Azure AD, and confirming you're a Global Admin—Power BI currently supports App-Only permissions only in tenants with active Premium capacity (P1 or higher), not just a Pro or Fabric Trial license.

Your Microsoft Fabric Trial does grant access to many Pro-level features, but it does not enable the App-Only permissions model for the Power BI REST API, which is why those permissions do not appear under the "Application Permissions" section. App-only authentication for Power BI REST APIs is tightly coupled with service principal support, which is only fully available in tenants that have dedicated Premium capacity (e.g., P1 SKU or higher). This limitation prevents service principals from acting independently of a user without the right licensing tier.

To resolve this, you'll need to:

Upgrade to a P1 or higher capacity (not just the Fabric Trial), or

Continue using delegated permissions with an interactive login (e.g., via Authorization Code flow), which requires a user session.