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Microsoft Defender Portal Submission Limits Explained
Question details
Administrators need to know if there is a limit on the number of suspected spam, phishing, or malware items they can submit to the Microsoft Defender portal.
- Product
- Microsoft Defender for Office 365
- Device & OS
- not provided
- Scenario
- Submitting suspected spam, phishing messages, URLs, or blocked legitimate emails for analysis in the Defender portal.
- Observed behavior
- Public documentation does not state an exact submission limit per user or tenant, leaving administrators unsure about their available quota.
Ensure you have global administrator or security administrator permissions in your Microsoft 365 tenant to access the Defender portal and submit items.
Check Submission Quotas via the Microsoft 365 Defender Portal
Navigate to the Submissions page to submit items and monitor your current usage, as limits depend on the tenant and submission type.
While Microsoft does enforce a limit on the number of submissions from the Defender portal, exact figures per user or tenant are not publicly specified. Microsoft dynamically manages these limits based on tenant type and submission volume.
To manage submissions and ensure you are within your organization's quota, use the dedicated Submissions page.
Log in to the Microsoft 365 Defender portal using your administrator credentials.
Go to the 'Actions & submissions' section in the navigation pane and select 'Submissions'.
Use the interface to submit suspected spam, phishing messages, URLs, or blocked emails. Monitor the page for any system alerts regarding rate limits.
If you encounter a submission block or need to verify your specific threshold, contact Microsoft Support directly through the admin center.
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Frequently Asked Questions
What types of items can I submit to the Microsoft Defender portal?
Administrators can submit suspected spam, phishing messages, malicious URLs, email attachments, and legitimate messages that were incorrectly blocked by security policies.
Why isn't the exact submission limit published by Microsoft?
Microsoft dynamically adjusts submission limits based on tenant size, license type, and current service loads to prevent abuse and ensure fair usage across all organizations.
How does Microsoft analyze the submitted emails and URLs?
Microsoft performs a comprehensive analysis that includes checking email authentication, evaluating policy hits, assessing payload reputation or detonation, and conducting grading analysis to improve future filtering.
