Microsoft 365 Alert – Service Degradation – Exchange Online – Users may encounter issues or delays accessing Exchange Online using multiple connection methods – RESOLVED

Announcements Arpan Das

24/07/2024 15:12:00 PM

NHSmail Reference: INC44566052

Microsoft Reference: EX832662

Issue Status: RESOLVED

Issue Description: Users may encounter issues or delays accessing Exchange Online using multiple connection methods.

More info: Impacted connection methods include, but aren’t limited to:

– Outlook desktop client
– Outlook on the web
– Outlook mobile

Final Update: 01/08/2024 10:25:00 AM – Microsoft have identified that a recent update to code that facilitates memory allocation contained an error, resulting in impact. They have reverted this change and confirmed remediation via service telemetry.

Scope of impact: Impact is specific to some users, served by the affected section of infrastructure, attempting to access the Exchange Online service through multiple connection methods.

Next steps: Microsoft are continuing our analysis of the memory allocation code contained within the update to better understand the underlying cause of impact and identify similar issues in during their validation processes.