Here are some things to consider:

Summary of Key Prerequisites for Serverless SQL Warehouses

• Premium or Higher Plan: Your workspace must be on the Premium plan or above.
• Supported Region: The workspace must be in a region that supports serverless SQL warehouses. Not all regions have this feature enabled yet.
• Unity Catalog Enabled: Required for serverless SQL warehouses in most cases.
• No External Hive Legacy Metastore: If legacy metastore credentials are configured at the workspace level, you cannot use serverless. You must remove these credentials.
• Account Not in Free Trial: Serverless is not available for accounts still in trial.
• Entitlements and Permissions: You (or your admin) must have the ‘Allow unrestricted cluster creation’ entitlement, and the workspace must allow users to create SQL warehouses.
• Additional Acceptance Steps: Sometimes, a banner at the feature enablement tab in the account console asks for acceptance of additional terms before serverless is available.
• Azure Only: Ensure you have no misconfigured storage firewall or VNet injection, as these features do not apply to serverless and can block enablement.

Common Reasons the Option Does Not Appear

• Region Not Supported: Even if your account is on the proper plan, the region may not yet be supported. Check the regional support matrix in the Databricks cloud documentation.
• Region Migration or Legacy Settings: Workspaces created before broad availability in your region might need support intervention or reconfiguration.
• Workspace Configuration Issue: If Unity Catalog or other prerequisites were enabled/changed after workspace creation, you may need admin intervention to remove old settings (like Hive metastore credentials) or reconfigure.
• Manual Enablement Not Complete: If you see neither the option nor a toggle in the account console, it's often because the backend feature flag was not set for your workspace, which may require Databricks support to resolve.
• Entitlement Restrictions: If you don't have the option to create a serverless warehouse, your user or group might lack the required entitlements or permissions. Workspace admins can check this in admin console settings.

Actionable Steps

1. Check All Workspace Prerequisites:
   • Confirm Premium/Enterprise plan.
   • Make sure Unity Catalog is enabled.
   • Verify region support.
   • Ensure no legacy Hive metastore configurations remain.
   • Ensure you are not on a trial account.
2. Inspect the Account Console:
   • Look for serverless feature toggles or banners that require acceptance of additional terms.
3. Contact Workspace Admin:
   • Request confirmation that you have ‘Allow unrestricted cluster creation’ entitlement.
4. If All Prerequisites Are Met, But Option Still Missing:
   • This is often a backend enablement or regional rollout issue. Escalate to your Databricks Account Team or open a Databricks support ticket. Specify:
     • Your workspace and region
     • That you have met all published prerequisites and still cannot see the serverless SQL warehouse option
   • Mention any relevant details, such as recent workspace migrations, changes in region, or Unity Catalog enablement.

Additional Notes

• Databricks periodically rolls out or restricts serverless by cohort, workspace creation date, and sometimes per customer request. Brand new workspaces are often enabled by default, but workspaces created earlier sometimes require explicit enablement by support.
• Serverless SQL warehouses are a requirement for Delta Sharing between different accounts.

Summary Table