O365 - Email/Outlook
| 2026-06-18 | Status | Description |
|---|---|---|
| 07:41 AM |
|
Active Issue: - Users may see that after selecting a meeting room when scheduling meetings, it changes from available to unavailable. Resolved Issue: - Users may have been unable to see the free/busy status of multiple cross-tenant mailboxes in Exchange Online. |
| 2026-06-17 | Status | Description |
|---|---|---|
| 03:37 PM |
|
Active Issues: - Users may see that after selecting a meeting room when scheduling meetings, it changes from available to unavailable. - Users may be unable to see the free/busy status of multiple cross-tenant mailboxes in Exchange Online. |
| 07:58 AM |
|
Users may be unable to see the free/busy status of multiple cross-tenant mailboxes in Exchange Online User impact: Users may be unable to see the free/busy status of multiple cross-tenant mailboxes in Exchange Online. More info: This impact occurs only when two or more mailbox statuses are requested. Current status: We've validated that the source of impact was a NetCore deployment, which introduced a regression where headers were being dropped during free/busy status requests for cross-tenant scenarios, resulting in back-end authentication requests failing. Our fix to address the regression is currently at 90 percent saturation in the affected environment, and we've reached out to affected users to begin testing for remediation. |
No Issue
Outage
