ShellCodeX Intelligence Brief
MEDIUM
Cloud
Microsoft investigates Exchange Online mailbox quarantines affecting customers
Source headline: Microsoft working to fix Exchange Online mailbox quarantine issue
Threat level
Medium
Signal strength
65/100
Source confidence
1 source
Published
3 hours ago
Intelligence Summary
Microsoft is addressing an Exchange Online problem where messages are being incorrectly quarantined. The issue has reportedly affected customers starting on Sunday. It can prevent legitimate emails from reaching inboxes as expected. Microsoft is working on a fix while monitoring impact and restoring normal mail flow. Users relying on Exchange Online should watch for missing or delayed messages and follow any guidance from Microsoft if their mail is quarantined.
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Topics
Original reporting
BleepingComputer
Microsoft working to fix Exchange Online mailbox quarantine issue
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