@KharchePrashant-2346 Can you please check your environment to make sure of the following?
First, you must check the state of your environment. Specifically, you must check if Active Directory PowerShell is installed, and if the shell is being executed with administrator privileges. Then check to see if the Az.Storage 2.0 module (or newer) is installed, and install it if it isn't. After completing those checks, check your AD DS to see if there is either a computer account (default) or service logon account that has already been created with SPN/UPN as "cifs/your-storage-account-name-here.file.core.windows.net". If the account doesn't exist, create one as described in the following section:
Please let me know if this helps. Thank you!
@Linden Thanks for reaching out to Microsoft Q&A. I understand that you are unable to upgrade to ADLS Gen2 storage account due to issues with Blobname being invalid.
I see that if you try to access these files using storage explorer, you cannot find them. Are you able to access them via the Portal or CLI/Powershell?
Get a Blob by Blob Name- Get-AzureStorageBlob -Container "ContainerName" -Blob blob* or
Remove it using Remove-AzStorageBlob:
Remove-AzStorageBlob -Container "ContainerName" -Blob "BlobName"
Please let me know. Thank you!
@HelpSBGP01-2332 Thank you for reaching out to Microsoft Q&A.
I understand that you are having trouble with duplication of files, however, I am unable to understand the issue clearly.
Can you explain the steps you are following and if possible, share any snapshots of what you are seeing so I can assist better? Thank you!
@BlazorDevCanada-8264 Apologize for the delay in responding to this question, I am looking into ti and will update soon! Thanks.
@BlazorDevCanada-8264 The only way to do this then since the App Registration (security principal) is in a B2C tenant is to use the Delegated permission - user_impersonation, this'll give the B2C App the same permissions as the signed in user.

Please refer to this document for more details- https://docs.microsoft.com/en-us/rest/api/storageservices/authorize-with-azure-active-directory#use-oauth-access-tokens-for-authentication
Hope this helps. Please do let me know if you need any further assistance. Thank you!
@GenryMorgan-3748 Please reach out to Azure Billing Support regarding this by opening a Support ticket with them which should be free. Here is how to reach them.
@CatherineBundyAquentLLC-2350 Glad to know that it helped you! Please let us know if you have any more questions and we will be glad to assist you further. Thank you!
Remember:
Please accept an answer if correct. Original posters help the community find answers faster by identifying the correct answer. Here is how.
Want a reminder to come back and check responses? Here is how to subscribe to a notification.
@NeharikaSingh-3132 Looks like the comp=list&restype=container added to the Uri is causing some issues.
Please remove it from the URI. Can you please confirm if you have any Firewall rules enabled for the storage account? Check here for - How to configure storage Firewall and for testing, please allow all traffic from all networks and see if that helps.
This thread has additional workarounds- https://stackoverflow.com/questions/24492790/azurestorage-blob-server-failed-to-authenticate-the-request-make-sure-the-value
Please let me know if that helps. Thank you!
@AnupamKapoor-8585 Thanks for reaching out to Microsoft Q&A. I understand that you are getting an error- "Request is not authorized to perform this action using this permission" when trying to run Azcopy.
Please try to use "Storage Blob Data Owner" permissions and try if that helps. If not, can you please let me know the following?
Did you choose all permissions here? If not, please choose all the permissions and try again.

Are you using ADLS Gen2?
Are you using User Delegation key?
@LHINDCARSTEN-1554 Let me add our Analytics team here for better insights to this issue..