How do I fix error: "There was an error trying to validate storage account name. Please try again"?

Question

How do I fix error: "There was an error trying to validate storage account name. Please try again"?

Dramane Salifou 20

I was trying to Create and setup a Synapse workspace:
Under Select Data Lake Storage Gen 2:
I could not set Account name, by selecting Create New, although my Azure account is upgraded.

Srikanth Chavithina 190 Reputation points Microsoft External Staff Moderator

2026-07-26T05:53:49.8+00:00
Hi @Dramane Salifou

Thank you for posting your question.

The error There was an error trying to validate storage account name. Please try again usually indicates that Azure cannot validate the Storage Account during Synapse workspace creation.

Please check the following:

Ensure the storage account name is globally unique.

Use only lowercase letters and numbers, with a length between 3 and 24 characters.

Verify that the Microsoft.Storage and Microsoft.Synapse resource providers are registered in your subscription.

Confirm that you have the required permissions (such as Owner or Contributor) on the subscription or resource group.

If the issue persists, please share:

Your subscription type (Pay-As-You-Go, Free Trial, Student, etc.).

The Azure region where you're creating the Synapse workspace.

Whether you can create a Storage Account separately from Azure Portal > Storage Accounts > Create.

A screenshot of the complete error message, if possible.

This information will help us investigate further and identify the root cause.

2 answers

Your answer

Srikanth Chavithina 190 Reputation points Microsoft External Staff Moderator

2026-07-26T05:53:49.8+00:00

Hi @Dramane Salifou

Thank you for posting your question.

The error There was an error trying to validate storage account name. Please try again usually indicates that Azure cannot validate the Storage Account during Synapse workspace creation.

Please check the following:

Ensure the storage account name is globally unique.

Use only lowercase letters and numbers, with a length between 3 and 24 characters.

Verify that the Microsoft.Storage and Microsoft.Synapse resource providers are registered in your subscription.

Confirm that you have the required permissions (such as Owner or Contributor) on the subscription or resource group.

If the issue persists, please share:

Your subscription type (Pay-As-You-Go, Free Trial, Student, etc.).

The Azure region where you're creating the Synapse workspace.

Whether you can create a Storage Account separately from Azure Portal > Storage Accounts > Create.

A screenshot of the complete error message, if possible.

This information will help us investigate further and identify the root cause.

Answer 1

Hi Dramane,

You should be able to work around the issue by first creating the resource group and storage account using Azure CLI and then when you create your Synapse Analytics workspace you would select the existing resource group and storage account.

To do this you may use Azure Cloud Shell and run commands similar to below (adjust location and names as needed:

az group create --name MySynapseGroup --location westus2
az storage account create --name contosolake493821as --resource-group MySynapseGroup --sku Standard_LRS --hns true --min-tls-version TLS1_2

In regards to the "There was an error trying to validate storage account name. Please try again" message you are seeing, unsure why you are getting this. Could be a transient issue. I tested right after you created your question and it worked fine for me--it gave proper message if the name was already taken, proper message if I attempted to use invalid characters, etc.

Please click Accept Answer and upvote if the above was helpful.

Thanks.

-TP

Answer 2

For Synapse workspace creation, this validation error is usually caused by one of these storage account issues:

The storage account name is invalid
- Storage account names must be 3 to 24 characters.
- Use only lowercase letters and numbers.
- The name must be globally unique across Azure.
The name is already taken
- Even if the name is not used in the current subscription, it can already exist elsewhere in Azure.
- Try a different unique name.
The name was recently deleted
- If the same storage account name was recently deleted and the new request comes from a different subscription or tenant, creation can be denied.
- In that case, create a support request and choose:
  - Problem type: Create new storage account
  - Problem subtype: Failure(s) during new account creation
The Microsoft.Synapse resource provider is not registered
- In the Azure portal, go to Subscriptions.
- Select the subscription.
- Under Settings, select Resource providers.
- Search for Microsoft.Synapse, select it, and then select Register.
If reusing an existing Data Lake Storage Gen2 account, required permissions must be set
- On the storage account, go to Access control (IAM).
- Add these role assignments for the user creating the workspace:
  - Owner
  - Storage Blob Data Owner
- Create a container, for example users.
- Then make sure the Synapse workspace managed identity has:
  - Storage Blob Data Contributor
During workspace creation, use the recommended setup
- Under Select Data Lake Storage Gen 2 > Account Name, select Create New.
- Enter a new globally unique storage account name.
- Under File system name, create or select users.
- If shown, select Assign myself the Storage Blob Data Contributor role on the Data Lake Storage Gen2 account.

If the portal still fails at validation, the most likely fix is to try a different globally unique lowercase name first, then verify Microsoft.Synapse is registered for the subscription.