# Exchange Online mailboxes sync delay \[office365\]

- Provider: [Front](https://down.guide/front)
- Level: confirmed
- Impact: Degraded
- lasted 18h 11m
- started 2024-11-25 08:41 UTC
- O365
- id: DWN-f3432d8c47
- Official page: https://stspg.io/gv8m0wtqpz5v

## Updates from Front
### 2024-11-25 08:41 UTC: identified
Our partner Microsoft is experiencing a service degradation affecting Exchange Online mailboxes. You can follow Microsoft Issue ID MO941162 for more details. This may cause outbound/inbound delays for customers using Office 365, as Front cannot connect to Microsoft servers.

### 2024-11-25 10:49 UTC: identified
Microsoft is still investigating the issue; here is their latest update.
\> We’re continuing to investigate recent changes, service telemetry and the failure paths to determine the root cause of impact.
Source: https://portal.office.com/Adminportal/Home#/servicehealth/:/alerts/MO941162 (You need to be an O365 admin to be able to access it)

### 2024-11-25 15:47 UTC: identified
Microsoft is deploying a fix
\> At 15:27 CET
\> We’re monitoring the progress of the fix, which has been deployed to approximately 60% of the affected environments. We’re continuing our manual restarts on the remaining impacted machines.
We are closely monitoring our systems for signs of recovery; however, we have not observed any significant progress at this time.

### 2024-11-25 20:26 UTC: monitoring
Microsoft deployed a fix. Our systems are recovering.
Latest update from Microsoft:
\> At 20:52 CET
\> We're continuing to redirect traffic and apply targeted remediation to impacted servers.
\> We've observed initially positive results in some areas, and we're monitoring service health closely as our mitigation workstreams continue in parallel.

### 2024-11-26 00:07 UTC: monitoring
Our systems have fully recovered. We are now retrying failed tasks.

### 2024-11-26 02:52 UTC: resolved
This incident has been resolved.

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