# SparkPost: Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365

> Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365. Detected 2026-11-13 by Rewindex: what changed on SparkPost’s status page, with the before/after diff.

Canonical: https://rewindex.com/change/rb58b9a0cad2e69
Last updated: 2026-11-13T00:03:43Z

**Summary:** _summary pending_
- Kind: Incident update · Label: not classified yet
- Changed: 2026-11-13 00:03 UTC · Detected: 2026-11-13 00:03 UTC
- [Source: https://status.sparkpost.com/incidents/37r4xk532jd6](https://status.sparkpost.com/incidents/37r4xk532jd6)
- [Company: SparkPost](https://rewindex.com/company/sparkpost.md)
- Versions: before incident\_version:755/37r4xk532jd6@b1a68e50abcd → after incident\_version:755/37r4xk532jd6@3af45d678700
- Change 3 of 6 for this incident

Incident page (full timeline): [Microsoft outage: delays delivering to Outlook, Hotmail and Office 365](https://rewindex.com/company/sparkpost/incidents/37r4xk532jd6.md)
## What changed

**1. Added: Update** (identified) · 2026-11-12 23:54 UTC

```diff
+ We're still monitoring Microsoft incident EX1550543. Microsoft says it has begun bringing affected servers back into service and is seeing limited recovery in some regions. We're seeing a gradual improvement too. More mail is getting through to Outlook.com, Hotmail, Live, MSN and Office 365 recipients than an hour ago, but most delivery attempts to Microsoft are still being deferred. Delays will continue until Microsoft completes its recovery. Microsoft expects to post its next update by 00:30 UTC, and you can follow it at https://status.cloud.microsoft/m365/referrer=serviceStatusRedirect. SparkPost's systems are working normally. Messages still waiting for Microsoft are queued and retried automatically, so please don't resend them. That would create duplicates once they are delivered. Because the problem has now lasted more than six hours, messages with an expiration time of up to several hours may expire before Microsoft accepts them. Each expired message generates a bounce event in your event data. Expired messages are no longer queued, so you can decide whether to resend those specific messages.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-11-12 21:43 UTC | [Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365](https://rewindex.com/change/r7506228251f9a0.md) |  |
| 2026-11-12 22:33 UTC | [Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365](https://rewindex.com/change/r403c7e39cf13b3.md) |  |
| 2026-11-13 00:03 UTC | Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365 (this change) |  |
| 2026-11-13 01:13 UTC | [Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365](https://rewindex.com/change/reff26e71f2a8e5.md) |  |
| 2026-11-13 03:13 UTC | [Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365](https://rewindex.com/change/r76cb3ac7c22169.md) |  |
| 2026-11-13 03:23 UTC | [Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365](https://rewindex.com/change/r4c3527cb8810d5.md) |  |

Previous: [change](https://rewindex.com/change/r403c7e39cf13b3.md) · Next: [change](https://rewindex.com/change/reff26e71f2a8e5.md) · All SparkPost changes: [timeline](https://rewindex.com/company/sparkpost/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._

## Cite this

Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365 on SparkPost’s status page, changed 2026-11-13 00:03 UTC (change 3 of 6).

- Canonical URL: https://rewindex.com/change/rb58b9a0cad2e69
- Citation: SparkPost, “Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365” (2026-11-13 00:03 UTC). Archived by Rewindex: https://rewindex.com/change/rb58b9a0cad2e69 (CC BY 4.0).
- Markdown link: `[SparkPost: Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365 (2026-11-13)](https://rewindex.com/change/rb58b9a0cad2e69)`


---
Canonical: https://rewindex.com/change/rb58b9a0cad2e69 · Markdown: https://rewindex.com/change/rb58b9a0cad2e69.md · JSON: https://rewindex.com/api/v1/changes/rb58b9a0cad2e69 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-13T04:05:55.659Z