Share via

A high-severity alert has been triggered

Anonymous
2025-06-13T05:32:52+00:00

A high-severity alert has been triggered

⚠ Messages have been delayed Severity: ● HighTime: 6/12/2025 4:00:14 PM (UTC)Activity: MessagesQueuedDetails: More than 2455 messages from Office 365 using connector 'Outbound to 18650086-c2f7-4e73-8a84-ff8fd51717c6' have been deferred for more than 1 hour.

Microsoft 365 and Office | Microsoft 365 Defender | Other | Other

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2025-06-13T07:12:29+00:00

    Hi there, Likitha.A! This is Marc. Thank you for reaching out Microsoft Community. I'm here to help.

    Regarding the high-severity alert you're experiencing. It seems like you've encountered a situation where outbound messages from Office 365 are being delayed, with over 2455 messages queued and deferred for more than an hour.

    To address this issue, here are some steps you can take:

    First, please check the Microsoft 365 Service Health Dashboard (https://admin.microsoft.com/AdminPortal/Home#/s...) to see if there are any known outages or service interruptions that might be affecting mail flow or causing message delays. This will provide insight into whether the issue is related to an ongoing Microsoft service disruption.

    Next, Use the Exchange Online message trace tool (https://admin.exchange.microsoft.com/) to review the messages that are queued and deferred. This can help you pinpoint the exact messages and identify if any specific configuration or rule is causing the delays.

    Lastly, Check for Throttling: If the volume of outbound messages is high, your Office 365 tenant could be experiencing throttling. Review the Throttling Policies in place to ensure that they are not overly restrictive for your needs. You can also look into increasing limits or adjusting mail flow policies.

    If the issue persists and you are unable to identify the root cause, I recommend reaching out to Microsoft Support for further assistance. They can provide in-depth troubleshooting and help resolve any underlying issues.

    I hope this helps resolve the issue promptly! Let me know if you need further assistance.

    Best regards,

    0 comments