Azure Analysis Service Migration Scenarios

[PriyaJha]

Hi All,

I am exploring Migration of Azure Analysis services to Fabric semantic model and in that migration i have enabled server redirection property and have rebinded my reports.

Now, i was trying to delete the original model in Azure Analysis service but not able to do as via SSMS as it is deleting the migrated semantic model and via Azure portal, there is no option to delete the model.

As the model has been migrated to semantic model, is there a way to delete the original model?

Also, i was getting error "Failed to delete" while deleting the Azure Analysis service from portal, is this expected scenario in this migration.

Any documentation mentioning these scenarios would be helpful.

[V-yubandi-msft]

Hi @PriyaJha ,
I wanted to follow up to see if your issue has been resolved or if you still need any assistance. If you need more information, feel free to let me know.

Thank you.

[V-yubandi-msft]

Hi @PriyaJha ,
Has your issue been resolved, or are you still running into trouble? Your feedback helps others who might be facing the same challenge.

Thank You

[Rufyda]

Hi @PriyaJha 
Here’s how you can safely delete the original Azure Analysis Services database after migrating to a Fabric semantic model:

Disable server redirection on the original AAS database temporarily.

Ensure all reports and applications are fully pointing to the Fabric semantic model and no dependencies remain on the original AAS.

Delete the original AAS database via SSMS or PowerShell.

Delete the AAS server if needed, after all databases are removed.

 Important: Do not delete the database while redirection is active, as it may affect your migrated Fabric model.

This should resolve the “Failed to delete” issue you’re seeing in the portal.
If this helps, consider giving some Kudos. If I answered your question, please mark this as the solution.

[V-yubandi-msft · Accepted solution]

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.