"We've ran commands to unblock the URLs, which will mitigate impact for all new email messages and links within email messages," the company added.
An increase in the number of Zapped Phish AIR investigations within Microsoft Defender for Office.An increase in the number of URL-related alerts for non-malicious URLs.
Microsoft Defender may be receiving a large amount of erroneous alerts, which could result in overall latency navigating within the Microsoft Defender portal.įurthermore, Microsoft Defender for Office 365 and Microsoft 365 Defender users should expect to see additional impact including:.Admins might see delays in getting latest alert information and email information in Threat Explorer.Users may get blocked from sending emails, if their messages were incorrectly detected as spam or phish.Users are unable to access links within emails as they're identified as risky.Users may notice legitimate messages are getting quarantined.Some of the domains include Google and LinkedIn. Users may be unable to send or receive email from various domains.Further information can be found under MO255463 in the admin center.Įmailing scenarios directly impacted by this ongoing issue include but are not limited to: We’re working to release the quarantined email messages.
Microsoft says the issue stems from an accidental block placed on valid and healthy domains, which resulted in legitimated emails inadvertently being quarantined.
"Some users see legitimate email quarantined/marked as malicious in Exchange Online Protection & Defender for Office 365." "Users having multiple issues related to email flow, links within email messages and the Microsoft Defender portal," Microsoft says in the Microsoft 365 admin center. Microsoft is working on addressing an Office 365 issue that has resulted in legitimate emails sent from multiple domains (including Google and LinkedIn) getting tagged as malicious and quarantined.
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