Some users may not be able to access Exchange Online via Outlook on the web

User impact: Users in North America may be unable to access their Exchange Online mailbox using Outlook on the web. More info: Affected users may encounter an unexpected 500 error when accessing Outlook on the web. Current status: We've determined that a recent system update to the Exchange Online service may have caused an impact. This update has now been stopped while we review diagnostic logs to explore mitigation options for the components that have already received this update. Next Update: Tuesday, June 27, 2023 at 9:00 AM CDT (21076971)