securityBACKGROUND
Microsoft working to fix Exchange Online mailbox quarantine issue
BACKGROUND
1 SIGNALFIRST DETECTED 23 July 2026
Narrative synthesis pending — 1 signal collected.
How the story developed
23 Jul
Microsoft working to fix Exchange Online mailbox quarantine issue
REPORT · WHAT · BleepingComputer
Other feeds and industry voices
31 Aug
Microsoft Exchange Online outage causes email failures, auth issues
Microsoft is investigating a widespread service issue causing authentication issues, email delays and failures, and various other issues for Exchange Online customers. [...]
REPORT · WHAT · BleepingComputerOPEN STORY
Sources
BleepingComputer
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