Customers have been reporting experiencing similar problems over the last two days, including having issues accessing the Quarantine Review page when using Microsoft Defender for 365 for email protection and being unable to release emails from quarantine. More recently, Microsoft also mitigated an outage earlier this week that blocked Outlook on the web users from accessing their Exchange Online mailboxes and addressed a week-long Exchange Online outage that caused delays or failures when sending or receiving emails. While the company has yet to share what regions are impacted, this Exchange Online incident has been tagged as a critical service issue tracked under EX1038119 on the Microsoft 365 admin center. Redmond's engineers are also tracking a separate incident (EX1038200) preventing users and admins from accessing the 'Review' page under the Email and Collaboration section in the Security portal. In August 2024, Microsoft resolved another Exchange Online false positive that erroneously tagged emails containing images as malicious and sent them to quarantine. Microsoft is investigating an Exchange Online bug causing anti-spam systems to mistakenly quarantine some users' emails. "The 'Review' page under the Email and Collaboration section in the Security portal is not accessible, displaying a blank page and not loading any data," Redmond explains. We're attempting to manually correct affected email message locations to remediate impact while we review for more offending URLs," the company added.
This Cyber News was published on www.bleepingcomputer.com. Publication date: Fri, 21 Mar 2025 17:15:13 +0000