[office365] Message Attachment Size Limit Error

What to do

• Check whether you use Front O365. Check your stack

  Drop a package.json, lockfile, Terraform or a list of domains at down.guide to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 5d 8h it lasted.

  Anything that failed between 2025-04-17 13:15 UTC and 2025-04-22 21:56 UTC may need a replay.

• Subscribe to Front's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=front works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Front 3

1. investigatingApr 17, 2025, 1:15 PM UTC

   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."

   provider

2. investigatingApr 17, 2025, 6:47 PM UTC

   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.

   provider

3. resolvedApr 22, 2025, 9:56 PM UTC

   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.

   provider

Corrections

None so far.

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