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@Peizhu S - Thanks for the question & using MS Q&A forum.
According to this documentation: Troubleshoot Power BI tenant scans | Microsoft Learn
It can take some time for schema to finish the scanning and ingestion process, depending on the size of your Power BI Tenant. Currently if you have a large PowerBI tenant, this process could take a few hours.
Below image shows the supported scenarios for Power BI scans for the Same-tenant:
Below image shows the supported scenarios for Power BI scans for the Cross-tenant:
If the issue persists, additionally follow these troubleshooting tips:
If delegated auth is used:
- Check your key vault. Make sure there are no typos in the password.
- Assign proper Power BI license to Power BI administrator user.
- Validate if user is assigned to Power BI Administrator role.
- If user is recently created, make sure password is reset successfully and user can successfully initiate the session.
For more information refer to this: Microsoft Power BI and Microsoft Purview work better together
Hope this helps. Do let us know if you have any further queries. .......................................................................
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