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Categories: Exchange Online

August 12, 2022

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Microsoft Defender for Office 365: Update to Quarantine retention period for Malware detections

Exchange Online, SharePoint Development Services

From Microsoft Corporation
Technical Bulletin MC406230 · Published Jul 27, 2022

Message Summary

Given feedback from our customer on the need for an additional time to triage the emails or files that were quarantined as result of potential malware we are increasing the retention period from 15 days to 30 days.

When this will happen

  • Standard Release: will begin rolling this out by end of July and expect to complete by late August.
  • Government: will begin rolling out by mid-August and expect to be complete by mid-September.

How this will affect your organization

Previously Admins had to triage quarantined malware emails and files within a 15-day period before they expired from quarantine, however with this change Admins have 30 days to triage before expiration happens 

What you need to do to prepare

You may consider updating your training and documentation as appropriate.

Additional information


QuixTec provides this and other technical bulletins unaltered from Microsoft. As an authorized Microsoft Partner, we ensure that all our solutions we deliver to you include the latest Microsoft updates.

ABOUT US: QuixTec, LLC is a U.S. certified Veteran Owned, modern DevOps organization with experience in a plethora of IT Software Languages.  As a Microsoft Partner, we specialize in Discounted Microsoft Software Licensing, Microsoft SharePoint, Microsoft365 and HTML5 technologies for small to enterprise-sized organizations. Our dedication to IT excellence is evidenced through our PECB ISO Certification training center. The only PECB ISO authorized center in Washington State. QuixTec, implements and provides training for upcoming open-source digital marketing services that are taking the industry by storm. This solution, used by over 100,000 businesses, provides enterprise level marketing capabilities at startup rates. The founder, Richard, has 30 years of experience working with several notable companies that include World Vision, Expedia, Microsoft, Levi Strauss, NASA, Boeing Aerospace, Los Alamos National Laboratory, and the U.S. Air Force, to name a few.  QuixTec is in the Seattle area. Phone today for a free consultation and project estimate.

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