Some users may be unable to search or see free/busy status of others in, or connect to classic Outlook desktop client

Title: Some users may be unable to search or see free/busy status of others in, or connect to classic Outlook desktop client

User impact: Users may be unable to search or see free/busy status of others in, or connect to classic Outlook desktop client.

More info: Impacted scenarios include, but aren't necessarily limited to, the following:
- Search
- Seeing free/busy status of others
- Connecting to Exchange Online mailboxes
- Setting Out of Office (OOF) status.

Current status: We're continuing our review of recent service changes and updates for timelines correlating with the impact to aid in our efforts to identify the underlying cause of the impact.

Scope of impact: Impact is specific to some users attempting to search or see free/busy status of others in, or connect to classic Outlook desktop client. This section may be updated as our investigation continues.

Next update by: Tuesday, November 25, 2025, at 11:30 PM UTC

Title: Some users may be unable to search or see free/busy status of others in, or connect to classic Outlook desktop client

User impact: Users may be unable to search or see free/busy status of others in, or connect to classic Outlook desktop client.

More info: Affected users also may be unable to set their Out of Office (OOF) status.

Current status: We've identified multiple additional impacted scenarios, and our investigation has led us to suspect that several Exchange Online endpoint URLs are missing, which is resulting in the impact. We've updated the Title, User Impact, and More info sections to reflect this as we continue our investigation, expanding to review recent changes and updates to isolate the root cause of impact.

Scope of impact: Impact is specific to some users attempting to search or see free/busy status of others in, or connect to classic Outlook desktop client This section may be updated as our investigation continues.

Next update by: Tuesday, November 25, 2025, at 8:00 PM UTC

Title: Some users may be unable to search in the classic Outlook desktop client

User impact: Users may be unable to search in the classic Outlook desktop client.

Current status: In addition to our analysis of service-side logs, we're reaching out to a subset of affected users to collect additional event logging to help determine our next troubleshooting steps.

Scope of impact: Impact is specific to some users attempting to search in the classic Outlook desktop client.

Next update by: Tuesday, November 25, 2025, at 6:30 PM UTC

Title: Some users may be unable to search in the classic Outlook desktop client

User impact: Users may be unable to search in the classic Outlook desktop client.

Current status: We're analyzing service-side logs to identify the root cause and develop a mitigation plan.

Scope of impact: Impact is specific to some users attempting to search in the classic Outlook desktop client.

Next update by: Tuesday, November 25, 2025, at 4:30 PM UTC

Title: Some users may be unable to search in the classic Outlook desktop client

User impact: Users may be unable to search in the classic Outlook desktop client.

Current status: We're proceeding to review service monitoring telemetry and support provided information to isolate the root cause and establish a fix.

Scope of impact: Impact is specific to some users attempting to search in the classic Outlook desktop client.

Next update by: Tuesday, November 25, 2025, at 2:30 PM UTC

Title: Some users are unable to search in the Outlook Desktop client and Outlook on the Web

User impact: Users are unable to search in the Outlook Desktop client and Outlook on the Web.

Current status: We're reviewing service monitoring telemetry and support provided information to determine our next troubleshooting steps.

Scope of impact: Your organization is affected by this event, and some users attempting to search in the Outlook Desktop client and Outlook on the Web are impacted.

Next update by: Tuesday, November 25, 2025, at 12:30 PM UTC