Front incident

[office365] Office channels offline preventing emails being sent or received

Major Resolved View vendor source →

Front experienced a major incident on May 28, 2026 affecting O365, lasting 4d 5h. The incident has been resolved; the full update timeline is below.

Started
May 28, 2026, 06:24 PM UTC
Resolved
Jun 01, 2026, 11:35 PM UTC
Duration
4d 5h
Detected by Pingoru
May 28, 2026, 06:24 PM UTC

Affected components

O365

Update timeline

  1. investigating May 28, 2026, 06:24 PM UTC

    We are currently investing an issue where a subset of customers are seeing offline O365 channels.

  2. identified May 28, 2026, 06:57 PM UTC

    We are attempting a mitigation step to get impacted channels back online.

  3. identified May 28, 2026, 07:35 PM UTC

    Front continues to investigate paths to restore access for affected Office365 channels. Office reports internal errors, which we are trying to work around.

  4. identified May 28, 2026, 11:36 PM UTC

    Front is partnering with Microsoft to investigate the channel sync failures and will continue to update here as we make progress. Manually re-authorizing the channel in Front's channel settings has worked in some cases, but not all. Please contact [email protected] for assistance.

  5. identified May 29, 2026, 02:05 AM UTC

    Front is continuing to partner with Microsoft to investigate the channel sync failures. The next update will be within the next 8 hours. Manually re-authorizing the channel in Front's channel settings has worked in some cases, but not all. Please contact [email protected] for assistance.

  6. identified May 29, 2026, 10:42 AM UTC

    Front is continuing to partner with Microsoft to investigate the channel sync failures. The next update will be within the next 6 hours. Manually re-authorizing the channel in Front's channel settings has worked in some cases, but not all. Please contact [email protected] for assistance.

  7. identified May 29, 2026, 06:38 PM UTC

    Front is continuing to partner with Microsoft to investigate the channel sync failures. The next update will be within the next 6 hours. Manually re-authorizing the channel in Front's channel settings has worked in some cases, but not all. Please contact [email protected] for assistance.

  8. identified May 29, 2026, 11:40 PM UTC

    Front is continuing to partner with Microsoft to investigate the channel sync failures. The next update will be within the next 6 hours. Manually re-authorizing the channel in Front's channel settings has worked in some cases, but not all. Please contact [email protected] for assistance.

  9. identified May 30, 2026, 03:37 AM UTC

    Front is continuing to partner with Microsoft to investigate the decreasing volume of channel sync failures. The next update will be within the next 12 hours. Manually re-authorizing the channel in Front's channel settings has worked in most cases, but not all. Please contact [email protected] for assistance.

  10. identified May 30, 2026, 04:04 PM UTC

    Front is continuing to partner with Microsoft to investigate the decreasing volume of channel sync failures. The next update will be within the next 12 hours. Manually re-authorizing the channel in Front's channel settings has worked in most cases, but not all. Please contact [email protected] for assistance.

  11. identified May 31, 2026, 03:17 AM UTC

    Front is continuing to partner with Microsoft to investigate the channel sync failures. The next update will be within the next 12 hours. Manually re-authorizing the channel in Front's channel settings has worked in most cases, but not all. Please contact [email protected] for assistance.

  12. identified May 31, 2026, 03:22 PM UTC

    Front is continuing to partner with Microsoft to investigate the channel sync failures. The next update will be within the next 12 hours. Manually re-authorizing the channel in Front's channel settings has worked in most cases, but not all. Please contact [email protected] for assistance.

  13. identified Jun 01, 2026, 02:57 AM UTC

    Front is continuing to partner with Microsoft to investigate the channel sync failures. The next update will be within the next 12 hours. Manually re-authorizing the channel in Front's channel settings has worked in majority of cases, but not all. Please contact [email protected] for assistance.

  14. identified Jun 01, 2026, 03:30 PM UTC

    Front is continuing to partner with Microsoft to investigate the channel sync failures. The next update will be within the next 12 hours. Manually re-authorizing the channel in Front's channel settings has worked in majority of cases, but not all. Please contact [email protected] for assistance.

  15. resolved Jun 01, 2026, 11:35 PM UTC

    Front is continuing to partner with Microsoft on root cause of remaining channel sync failures. We added the ability to automatically bring these channels back online to prevent further customer impact.