Microsoft 365 Alert – Service Degradation – Exchange Online – Users may be unable to modify Exchange Online groups in Outlook on the web and encounter an error – RESOLVED

Announcements Arpan Das

28/08/2025 09:12:00 AM

NHSmail Reference: INC46614382

Microsoft Reference: EX1075717

Issue Status: RESOLVED

Issue Description: Some users may be unable to modify Exchange Online groups in Outlook on the web and encounter an error.

More info: Affected users may encounter the following error:

“This doesn’t look right.”

As a workaround, users who have access may be able to utilize the Outlook desktop client.

Final Update: 08/09/2025 10:56:00 AM – Microsoft have successfully deployed the fix, and service telemetry confirms that the issue has been fully resolved.

Scope of impact: Impact is specific to some users attempting to modify Exchange Online groups in Outlook on the web.

Root cause: An authentication component misconfiguration with the enforcement of the Continuous Access Evaluation (CAE) process, is causing impact to occur.

Next steps: Microsoft have successfully deployed the fix, and service telemetry confirms that the issue has been fully resolved.