Access to Custom Workload Developer Preview in Microsoft Fabric for Fabric Workload Development Kit

Hi Ashwath_Bala_S ,

Found the issue with your "FeatureNotAvailable" error - it's basically because the right switches aren't turned on in your tenant.

Here's what's missing:

Your Fabric admin needs to enable a couple of settings:

• Go to Admin portal > Tenant settings > Additional workloads
• Turn on "Workspace admins can develop partner workloads"
• Then hit Settings > Developer settings and enable "Fabric Developer Mode"

Without these enabled, the Custom Workload Developer Preview just doesn't exist for your tenant - hence the FeatureNotAvailable error when DevGateway tries to connect.

You also need:

• F or P SKU capacity (trial works fine)
• Admin rights on the workspace you're using
• Proper Entra ID app setup from the sample repo

The GitHub sample assumes these tenant settings are already on, but they're not enabled by default. Once your admin flips those switches, the DevGateway should connect without issues.

Pretty common gotcha with Fabric development - the feature exists but you can't see it until the tenant-level permissions are sorted.

Give it a try after enabling those settings and let me know if you're still hitting the same error.

If my response resolved your query, kindly mark it as the Accepted Solution to assist others. Additionally, I would be grateful for a 'Kudos' if you found my response helpful.

This response was assisted by AI for translation and formatting purposes.