{"id":1675,"date":"2023-05-24T04:01:09","date_gmt":"2023-05-23T19:01:09","guid":{"rendered":"https:\/\/m365jp.xyz\/?p=1675"},"modified":"2023-05-24T04:15:48","modified_gmt":"2023-05-23T19:15:48","slug":"investigationsuspended-ex556056-exchange-online-some-users-legitimate-inbound-email-messages-are-being-marked-as-spam-and-quarantined-in-exchange-online","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2023-05-24-investigationsuspended-ex556056-exchange-online-some-users-legitimate-inbound-email-messages-are-being-marked-as-spam-and-quarantined-in-exchange-online","title":{"rendered":"[investigationSuspended] EX556056 | Exchange Online | Some users’ legitimate inbound email messages are being marked as spam and quarantined in Exchange Online"},"content":{"rendered":"
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EX556056 | Exchange Online | Some users’ legitimate inbound email messages are being marked as spam and quarantined in Exchange Online<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\ninvestigationSuspended<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers’ legitimate inbound email messages are being marked as spam and quarantined in Exchange Online.<\/td>\n<\/tr>\n
Last Updated<\/th>\n05\/23\/2023 18:20:33<\/td>\n<\/tr>\n
Start Time<\/th>\n05\/15\/2023 20:17:00<\/td>\n<\/tr>\n
End Time<\/th>\n05\/23\/2023 18:19:56<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users’ legitimate inbound email messages are being marked as spam and quarantined in Exchange Online<\/p>\n

User impact: Users’ legitimate inbound email messages are being marked as spam and quarantined in Exchange Online.<\/p>\n

Final status: After adding a collection of impacted URL domains to our allow list and a majority of affected users have responded that confirming impact remediation. Additionally, our monitoring of the issue indicates that users should no longer be experiencing the impact. Please contact your support representative to confirm that your organization is no longer seeing impact or to provide example email messages for review if impact persists. <\/p>\n

Scope of impact: Impact is specific to a subset of users receiving email messages containing the affected URL domain via Exchange Online.<\/p>\n

Start time: Monday, May 15, 2023, at 8:17 PM UTC<\/p>\n

Root cause: A logic error in our automated anti-spam algorithm caused it to identify some links to a specific domain within the affected email messages as harmful, leading to impact.<\/p>\n

This is the final update for this event.<\/td>\n<\/tr>\n

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