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(Resumed) Users may be unable to see free and busy information for other users within their organization through Outlook

Microsoft issued an incident report on 7 Jul 2025 (Mon)

Users Affected Any user who attempts to access the Outlook calendar
Start Time 7 Jul 2025 (Mon) 1:43 PM
End Time 8 Jul 2025 (Tue) 10:00 PM
User Impact Users may be unable to see free and busy information for other users within their organization
Incident Details Final status:

Further on Microsoft’s investigation and analysis of the impact has identified a larger service infrastructure related issue that is causing their inventory cache probe to be incorrectly quarantined, and leading to impact across multiple Microsoft 365 services. They have completed our configuration change to increase the timeout for the inventory cache probe to prevent it from being quarantined. They have reviewed the service health and confirmed it’s stabilized and impact has been successfully remediated.

 
Status Restored

Last update by Microsoft: 9 Jul 2025 (Wed) 9:48 AM

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