Hi Daniel Rowley,
Thank you for reaching out to us on the Microsoft Q&A forum.
Based on the query posted, we understand that you are experiencing difficulty while attempting to create the Data Lake Storage Gen 2 account.
Please kindly follow the troubleshooting steps as mentioned below to address the error:
Step 1: Unique Account Name: Ensure that the account name you are attempting to create is distinct. Azure storage account names must be globally unique across all Azure subscriptions. If the selected name is already in use by another user, you must select an alternative name.
Step 2: Valid Characters: Confirm that your account name adheres to the specified criteria:
It may only consist of lowercase letters, numbers, and hyphens.
It must commence with a letter or a number.
It must be between 3 and 24 characters in length.
Step 3: Check for Typographical Errors: Thoroughly review the account name for any typographical errors. Occasionally, minor errors can result in validation issues.
Step 4: Try a Different Name: If you have followed the aforementioned steps and continue to encounter an error, consider selecting a different account name. You may incorporate a unique identifier, such as your initials or a random string, to ensure uniqueness.
Step 5: Retry: Upon confirming that the account name meets the specified requirements, proceed by clicking the "Try again" button to initiate the account creation process.
Remember that the account name you choose will be part of the URL for accessing your Data Lake Storage Gen 2 resources, so it’s essential to pick a meaningful and unique name.
If the information is helpful, please accept the answer by clicking the "Upvote" and "Accept Answer" on the post.
If you are still running into issues, please let us know in the comments. We are glad to help you.