Hi @Priya Jha ,
Thank you for posting query in Microsoft Q&A Platform.
Usually, Unauthorized access
error will come when the identity which is getting used will not have sufficient permissions to perform task.
In case of PowerBI the setting explicitly called out to use security groups. Hence there we should use security groups only. Please check below screenshot.
In case of AAS kindly consider adding managed Identity itself as AAS admin.
Hope this helps. Please let me know for any queries.
Please consider hitting Accept Answer
button. Accepted answers help community as well.