{"id":17357,"date":"2026-07-16T13:02:27","date_gmt":"2026-07-16T04:02:27","guid":{"rendered":"https:\/\/m365jp.net\/?p=17357"},"modified":"2026-07-16T13:05:43","modified_gmt":"2026-07-16T04:05:43","slug":"servicedegradation-ex1428537-exchange-online-some-users-may-be-unable-to-view-mailbox-storage-data-in-outlook-and-outlook-on-the-web","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-07-16-servicedegradation-ex1428537-exchange-online-some-users-may-be-unable-to-view-mailbox-storage-data-in-outlook-and-outlook-on-the-web","title":{"rendered":"[serviceDegradation] EX1428537 | Exchange Online | Some users may be unable to view mailbox storage data in Outlook and Outlook on the web"},"content":{"rendered":"
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EX1428537 | Exchange Online | Some users may be unable to view mailbox storage data in Outlook and Outlook on the web<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceDegradation<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may be unable to view mailbox storage data in Outlook and Outlook on the web.<\/td>\n<\/tr>\n
Last Updated<\/th>\n07\/16\/2026 03:31:09<\/td>\n<\/tr>\n
Start Time<\/th>\n07\/15\/2026 11:35:17<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may be unable to view mailbox storage data in Outlook and Outlook on the web <\/p>\n

User impact: Users may be unable to view mailbox storage data in Outlook and Outlook on the web. <\/p>\n

More info: Affected users are shown the following error message “Storage data is temporarily unavailable” when trying to view mailbox storage data for multiple mailboxes. <\/p>\n

Current status: We’ve identified that a recent service build introduced an unsupported property into mailbox statistics data. When the service attempted to retrieve mailbox storage information, the unsupported property caused the request to fail and prevented mailbox storage data from being displayed. We’ve deployed a code fix to remove the unsupported property and are monitoring service telemetry to verify its success in fixing the issue. <\/p>\n

Scope of impact: Some users attempting to view mailbox storage data in Outlook and Outlook on the web may be impacted. This information may be updated as our investigation continues. <\/p>\n

Root cause: A recent service build introduced an unsupported property into mailbox statistics data returned by a backend process. When the service attempted to retrieve mailbox storage information, the unsupported property caused the request to fail and prevented mailbox storage data from being displayed. <\/p>\n

Next update by: Wednesday, July 22, 2026, at 1:30 PM UTC<\/td>\n<\/tr>\n

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