Some users may be unable to create new online meetings from shared calendar events in Exchange Online

Title: Some users may be unable to create new online meetings from shared calendar events in Exchange Online

User impact: Users may be unable to create new online meetings from shared calendar events in Exchange Online.

More info: Affected users can create online meetings from their personal calendars as an alternative method, and existing shared calendar events remain unaffected.

Current status: We've identified that a recent service update in Exchange Online introduced an issue within an authorization component of the calendar service, resulting in impact. We're developing and validating a code fix to address the issue and will provide a deployment timeline once it becomes available.

Scope of impact: Impact is specific to some users attempting to create new online meetings from shared calendar events in Exchange Online.

Start time: Tuesday, May 26, 2026, at 12:00 AM UTC

Root cause: A recent service update in Exchange Online introduced an issue within an authorization component of the calendar service, resulting in impact.

Next update by: Monday, June 01, 2026, at 6:00 PM UTC

Title: Some users may be unable to create new online meetings from shared calendar events in Exchange Online

User impact: Users may be unable to create new online meetings from shared calendar events in Exchange Online.

Current status: We’re continuing to investigate the issue that is causing failures when obtaining authentication tokens within the calendar service. We’re also continually working to validate if the aforementioned service update is contributing to impact, and what remediation actions are required.

Scope of impact: Impact is specific to some users attempting to create new online meetings from shared calendar events in Exchange Online.

Start time: Tuesday, May 26, 2026, at 12:00 AM UTC

Next update by: Saturday, May 30, 2026, at 8:00 PM UTC

Title: Some users may be unable to create new online meetings from shared calendar events in Exchange Online

User impact: Users may be unable to create new online meetings from shared calendar events in Exchange Online.

Current status: We’re investigating an issue that is causing failures when obtaining authentication tokens within the calendar service. We’ve identified a potential correlation with a recent service update and are testing mitigation actions to validate impact and confirm a resolution path.

Scope of impact: Impact is specific to some users attempting to create new online meetings from shared calendar events in Exchange Online.

Next update by: Saturday, May 30, 2026, at 1:30 PM UTC

Title: Some users may be unable to create new online meetings from shared calendar events in Exchange Online

User impact: Users may be unable to create new online meetings from shared calendar events in Exchange Online.

Current status: We’re reviewing service telemetry to isolate the root cause of the issue and determine a fix.

Scope of impact: Impact is specific to some users attempting to create new online meetings from shared calendar events in Exchange Online.

Next update by: Saturday, May 30, 2026, at 11:30 AM UTC