Azure Analysis Service Migration Scenarios

Hi PriyaJha ,

Thank you for engaging with the Microsoft Fabric Community. This is a common point of confusion. Once server redirection is enabled during the migration from Azure Analysis Services to Fabric semantic models, client tools and reports start referencing the Fabric model. However, deleting the original AAS server is not supported while redirection is active.

FYI:

So,
1. You can pause AAS server via the Azure Portal or REST API to avoid while keeping redirection active.

2.If you no longer need redirection, disable it in Power BI first, then retry deleting the server.

3. Make sure there are no active bindings or dependencies before attempting deletion.

Helpful Reference
Migrate Azure Analysis Services to Power BI - Microsoft Fabric | Microsoft Learn

Regards,
Yugandhar.