Outage in HENNGE One

An Issue in HENNGE Cloud Protection: False positive detection for a specific URL

Minor
December 02, 2025 - Started about 6 hours ago
Official incident page

Incident Report

現在 HENNGE Cloud Protecton サービスにて特定 URL が誤って検知される事象を確認しており、詳細につきまして調査中です。 ------------------------------------------- We are currently investigating an issue with the HENNGE Cloud Protecton service where a specific URL is being incorrectly detected, and details are under investigation.

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Latest Updates ( sorted recent to last )
MONITORING about 2 hours ago - at 12/03/2025 05:14AM

本件につきまして続報です。
WithSecure社による対応が行われ、現在は Microsoft 関連の URL が誤って検知される事象は解消したことを確認いたしました。

誤って検知されてしまったメールなどのアイテムが隔離されている場合につきまして、一括で解放する手段などについては現在 WithSecure社へ確認を行っております。
恐れ入りますがお急ぎの場合は管理画面から解放の操作を実施くださいますようお願い致します。

この度はご迷惑をおかけしましたことをお詫び申し上げます。

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Here is a follow-up report regarding this matter.

We have confirmed that the issue where Microsoft-related URLs were incorrectly detected has been resolved, following remediation by WithSecure.

Regarding items such as emails that were incorrectly quarantined, we are currently checking with WithSecure about methods, such as bulk release, to restore them. We apologize, but if this is urgent, please carry out the release operation from the administration screen.

We sincerely apologize for the inconvenience this has caused.

INVESTIGATING about 5 hours ago - at 12/03/2025 02:29AM

本件につきまして続報です。

現在も詳細につきましては WithSecure社 と協力して調査中となります。

現時点で弊社にて確認している範囲となりますが一時的な回避策として
HENNGE Cloud Protection のポリシー [Exchange] > [URLスキャン] > [信頼済みのWebサイト] の設定をオンにしていただき
下記の URL を信頼済みに設定いただくことで回避できる可能性がございますので、お試しいただけますと幸いでございます。

・https://aka.ms/LearnAboutSenderIdentification
・https://aka.ms/o0ukef

ご迷惑をおかけしており申し訳ありません。

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Here is an update regarding this matter.

We are currently continuing to investigate the details in cooperation with WithSecure.

While we are still in the process of confirming the full scope of the issue, we have identified a potential temporary workaround:

Could you please enable the setting for "Trusted Websites" within the HENNGE Cloud Protection policy under [Exchange] > [URL Scanning] , and add the following URLs to the trusted list?

・https://aka.ms/LearnAboutSenderIdentification
・https://aka.ms/o0ukef

We kindly ask you to try this workaround. We apologize for the inconvenience this is causing you."

INVESTIGATING about 6 hours ago - at 12/03/2025 01:32AM

現在 HENNGE Cloud Protecton サービスにて特定 URL が誤って検知される事象を確認しており、詳細につきまして調査中です。

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We are currently investigating an issue with the HENNGE Cloud Protecton service where a specific URL is being incorrectly detected, and details are under investigation.

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