Fabric Apps 403 error Japan East region

[setotoset]

Body:

Hi community,

I'm trying to deploy my first Fabric Apps project using the Rayfin CLI, but I'm running into a 403 error and can't find a solution.

Environment:

• Tenant region: Japan East
• Workspace: F-SKU capacity assigned
• Tenant admin setting: "Fabric Apps (preview)" is enabled for the entire organization

Problem 1 – rayfin up fails with 403

When I run "npx rayfin up", I get the following error:

Creating new Rayfin item "my-demo-app"... Error: Fabric API error: 403 Forbidden Details: The feature is not available

Problem 2 – "App" item not visible in portal

When I go to my workspace → New item, the App item does not appear in the list at all. This makes me think the feature hasn't been rolled out to the Japan East region yet.

What I've tried:

• Confirmed tenant admin setting is enabled (organization-wide)
• Tried signing in with multiple accounts

Question:

Is Fabric Apps currently available only in specific regions? Is there a list of supported regions for the preview? Any workaround to test this in Japan?

Thanks in advance!

---

Rayfin CLI を使って Fabric Apps プロジェクトのデプロイを試みていますが、403 エラーが発生し解決できません。

環境：

• テナントリージョン：Japan East
• ワークスペース：F-SKU キャパシティ割り当て済み
• テナント管理者設定：「Fabric Apps (preview)」を組織全体で 有効化済み

問題1 – rayfin up が 403 で失敗する

「npx rayfin up」を実行すると以下のエラーが発生します：

Creating new Rayfin item "my-demo-app"... Error: Fabric API error: 403 Forbidden Details: The feature is not available

問題2 – ポータルの「新しいアイテム」に App が表示されない

ワークスペース → 新しいアイテム を開いても、App の項目が一覧に表示されません。Japan East リージョンにまだ展開されていないのではないかと考えています。

試したこと：

• テナント管理者設定が組織全体で有効になっていることを確認
• 複数のアカウントでサインインを試みた

質問：

Fabric Apps は現在、特定のリージョンでのみ利用可能ですか？プレビューの対応リージョン一覧はありますか？日本でテストするための回避策があれば教えてください。

[V-yubandi-msft]

Hi @setotoset ,

Thank you for your patience and understanding. It is reasonable to wait for the feature to become available in Japan East in this case. We appreciate you sharing your results, as this information could benefit other community members experiencing similar issues.

Please continue to stay enagaged with the community, and let us know if you need any further information, support or clarification from us.

Best regards.

Yugandhar.

[deborshi_nag]

Hello @setotoset 

Fabric App is not available in Japan East - see highlights in screenshot. 

Fabric region availability - Microsoft Fabric | Microsoft Learn

[setotoset]

Hi @oussamahaimoud ,

Thank you for the clear explanation! It's a shame that Japan East isn't supported yet.

Since deploying a new capacity in our organization requires an approval process that takes some time, we've decided to wait until Fabric Apps becomes available in Japan.

I'll keep an eye on the region availability page you shared.

Thanks again for your help!

Best regards, Seto

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[oussamahaimoud]

Hi @setotoset,

Hope you're doing well!

As I know, The 403 "feature is not available" error from the Fabric API, combined with the App item not appearing in the New Item list, is the classic symptom of a feature that hasn't reached your tenant's home region yet, the tenant setting being enabled is a necessary but not sufficient condition.

So, the solution for you is to create a new Fabric capacity in a region where Fabric Apps is confirmed working (East US 2, West Europe, or UK South are safest bets for new previews), assign your workspace to that capacity, and try rayfin up again. If your home region doesn't reside in a supported region, you can create a capacity in a region where Fabric is available and use Fabric's multi-geo capabilities.

For the official list and to track when Japan East gets added, keep an eye on aka.ms/FabricRegionAvailability, this article is frequently updated to reflect the latest region support. You can also follow the Microsoft Fabric Blog https://blog.fabric.microsoft.com/en-US/blog/fabric-may-2025-feature-summary/ for region expansion announcements as they roll out.

Assisted by AI for clarty of wording!

Hope this helps!

Best regards,

Oussama (Data Consultant - Expert Fabric & Power BI)