# \[office365\] Message Attachment Size Limit Error

- Provider: [Front](https://down.guide/front)
- Level: confirmed
- Impact: Degraded
- lasted 5d 8h
- started 2025-04-17 13:15 UTC
- O365
- id: DWN-24727d02b1
- Official page: https://stspg.io/c68wg7mcpn43

## Updates from Front
### 2025-04-17 13:15 UTC: investigating
We received reports from a small number of customers that some drafts error when sending, with the message:
"Unexpected problem sending attachment larger than 3MB to Office 365."

### 2025-04-17 18:47 UTC: investigating
Office 365 servers may sometimes fail to accept attachments larger than 3 MB. As a temporary alternative, we suggest using another method of sharing files with recipients, such as OneDrive. We have communicated the issue to Microsoft and are investigating additional mitigations.

### 2025-04-22 21:56 UTC: resolved
There has been a significant reduction in the number of failures for Office 365 requests with attachments larger than 3 MB. We will continue to monitor.

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