Embed from a shared capacity workspace not working

trebllaw 

The issue you're experiencing with the "Forbidden" status code when attempting to access reports programmatically suggests that there might be a permissions or configuration problem, especially as it pertains to workspaces on shared capacities. Here are some steps and considerations that can help you troubleshoot and potentially resolve this issue:

1. **Check Workspace Access**: Verify that the Azure application (service principal) still has access to the workspaces in question. Even though you mentioned that a security group with the Azure application as a member is added to these workspaces, it's good to double-check the current access rights directly in the workspace settings.

2. **Examine Service Principal Permissions**: Ensure that the service principal associated with the Azure application has the appropriate API permissions set in Azure AD. It should have the necessary permissions to view and interact with Power BI workspaces and datasets. You might need to review and perhaps re-consent to the API permissions if they were modified or if policies governing these permissions changed.

3. **Tenant Settings Review**: Although you noted that no changes were made to the Tenant settings, it's beneficial to review them to ensure that nothing was altered inadvertently that could impact service principals. Look specifically at settings under "Admin Portal" > "Tenant settings" related to developer settings and service principal usage.

4. **Review Azure AD Group Membership**: Confirm that the security group (that includes the Azure application) has not been modified or removed accidentally from the workspace access list in Power BI.

5. **License and Capacity Issues**: Shared capacity and Premium capacity have different characteristics regarding API access and concurrent usage limits. Ensure that the limits imposed by the shared capacity are not being exceeded, which could potentially lead to access issues.

6. **Audit Logs and Error Messages**: Check the audit logs in both Azure AD and Power BI for any additional

information about the denied access attempts. These logs can provide clues about what might be going wrong.

7. **Authentication and Token Acquisition**: Verify that the authentication process and token acquisition steps are functioning as expected. Ensure that the client ID and secret used for the Azure application are current and have not expired.

8. **Network and Security Changes**: Consider if there have been any network or security policy changes in your organization that might affect communication between your internal website and the Power BI service.

If these steps do not resolve the issue, you might need to reach out to Microsoft Support for a deeper investigation into this problem, especially to understand if there have been any changes in how shared capacities handle service principal access.

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