M-Files now blocks Microsoft-flagged malware at the point of access

If Microsoft Defender marks a file as malicious, M-Files stops it being previewed or downloaded. The protection is included for M-Files Cloud customers on Microsoft 365 Storage. No separate add-on. No extra Defender licence.

What is new

Microsoft Defender for Office 365 already scans files stored in Microsoft 365 Storage for malware. Until now, that verdict lived inside Microsoft. M-Files for Microsoft Defender closes the gap. M-Files reads the Defender malware status and enforces it at the moment someone tries to open a file.

When a file is flagged as malicious, M-Files blocks the preview and the download and shows the user a clear message explaining why access is restricted. It works the same way on both the desktop and web clients, without changing how your teams work day to day. Investigation and remediation stay where they belong, inside the Microsoft Defender portal.

Who does what

The division of labour is clean. Microsoft detects. M-Files enforces. 

Microsoft doet de detectie

• Scant bestanden in Microsoft 365 Storage (SharePoint Embedded) met ingebouwde Defender-malwarebescherming.
• Markeert bestanden die als malware worden herkend met een schadelijk-statussignaal.
• Houdt onderzoekstools en gebeurtenislogs bij in de Defender-portal.

M-Files doet de handhaving

• Controleert de Defender-malwarestatus voordat een bestand voor preview of download wordt aangeboden.
• Blokkeert gemarkeerde bestanden en toont de gebruiker een duidelijke reden.
• Past dezelfde bescherming toe in desktop en web, zonder verstoring van de workflow.

Microsoft assure la détection

• Analyse les fichiers dans Microsoft 365 Storage (SharePoint Embedded) avec la protection Defender intégrée.
• Signale les fichiers identifiés comme malveillants par un statut dédié.
• Conserve les outils d'investigation et l'historique des événements dans le portail Defender.

M-Files assure l'application

• Vérifie le statut Defender avant de servir un fichier en aperçu ou en téléchargement.
• Bloque les fichiers signalés et affiche à l'utilisateur un motif clair.
• Applique la même protection sur bureau et web, sans perturber les flux de travail.

Microsoft handles detection

• Scans files in Microsoft 365 Storage (SharePoint Embedded) with built-in Defender malware protection.
• Flags files identified as malware with a malicious status signal.
• Keeps threat investigation tooling and event records in the Defender portal.

M-Files handles enforcement

• Checks the Defender malware status before serving any file for preview or download.
• Blocks flagged files and shows the user a clear reason for the restriction.
• Applies the same protection across desktop and web, with no workflow disruption.

Why this matters for regulated teams

For accountancy firms, engineering practices, legal teams and public-sector bodies, business-critical content cannot be a blind spot. This integration extends the malware controls already running in your Microsoft 365 tenant to the content you manage and govern in M-Files. 

Does your setup qualify?

This capability has clear boundaries. Use this checklist to confirm you are covered.

• M-Files Cloud, using Microsoft 365 Storage
• Microsoft 365 built-in malware protection active in your tenant
• Microsoft 365 Storage activation in place

• 
  
  • M-Files Server (on-premises): not available.
  • M-Files Cloud vaults that do not use Microsoft 365 Storage: not available.

Pricing and packaging

M-Files for Microsoft Defender is included for M-Files Cloud customers using Microsoft 365 Storage. There is no separate M-Files add-on, and no additional Microsoft Defender licensing is needed for this capability. Microsoft 365 Storage activation is the only prerequisite.

Not sure if your vault is covered? We will check.

SoftAdvice reviews your M-Files deployment and Microsoft 365 configuration, confirms whether this protection applies to you, and activates Microsoft 365 Storage where it makes sense. 

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