June 24, 2024
032124 2040 Howtocreate5 - How to create custom Safe Attachments policies in Microsoft Defender for Office 365
In Microsoft Defender for Office 365, Safe Attachments is a feature that helps protect your organization from malicious email attachments. It automatically scans email attachments for potential threats, such as malware or viruses, before delivering them to recipients' mailboxes.

In Microsoft Defender for Office 365, Safe Attachments is a feature that helps protect your organization from malicious email attachments. It automatically scans email attachments for potential threats, such as malware or viruses, before delivering them to recipients’ mailboxes.

The Built-in Protection preset security policy automatically protects all recipients from Safe Attachments. Recipients designated in standard or strict preset security rules and custom Safe Attachments policies are unaffected.

To create a Safe Attachment policy in Microsoft Defender for Office 365, you can follow these general steps:

1.Login to the Microsoft Defender portal using your organization’s credentials.

https://security.microsoft.com/

2.Expand the Email & collaboration on the Microsoft Defender page and select Policies & rules.

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3.Select Threat policies on the Policies & rules page.

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4.Select Safe Attachments in the Policies.

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5.Click Global settings on the Safe attachments page.

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6.On the Global settings page, you can turn Safe Attachments on for emails and SharePoint, OneDrive, and Microsoft Teams. You can also turn on Safe Documents for office clients, but the E5 license requirement. Keep the default settings in Global settings.

032124 2040 Howtocreate5 - How to create custom Safe Attachments policies in Microsoft Defender for Office 365

7.Click Create on the Safe attachments page.

Note:

The Default Built-in protection (Microsoft) is part of the preset security policies. It’s lowest priority.

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8.On the Name your policy page, enter a unique Name and description for the policy. Click Next.

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9.On the Users and domains page, you can select the internal recipients to which the policy applies and click Next.

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10. There are four options for unknown malware response on the Settings page. Select the Block.

Note:

If you are using Standard and Strict preset security policies, it’s the default and recommended setting.

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11.Select the custom quarantine policy from the drop-down list if you created previously and click Next. The default is AdminOnlyAccessPolicy.

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12.If you chose the Monitor as the Safe Attachments unknown malware response, you can select Enable redirect and send it to the specified email address.

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13.Click Submit on the Review page.

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14.Ensure the New Safe Attachments policy is created and click Done.

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15.The priority value of the new Safe Attachments policy is 0.

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I hope you enjoy this post.

Cary Sun

X: @SifuSun

Web Site: carysun.com

Blog Site: checkyourlogs.net

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ca16fbd3199de5f66b829b87082fb970?s=80&d=retro&r=g - How to create custom Safe Attachments policies in Microsoft Defender for Office 365

Author: Cary Sun

Cary Sun has a wealth of knowledge and expertise in data center and deployment solutions. As a Principal Consultant, he likely works closely with clients to help them design, implement, and manage their data center infrastructure and deployment strategies.
With his background in data center solutions, Cary Sun may have experience in server and storage virtualization, network design and optimization, backup and disaster recovery planning, and security and compliance management. He holds CISCO CERTIFIED INTERNETWORK EXPERT (CCIE No.4531) from 1999. Cary is also a Microsoft Most Valuable Professional (MVP), Microsoft Azure MVP, Veeam Vanguard and Cisco Champion. He is a published author with several titles, including blogs on Checkyourlogs.net, and the author of many books.
Cary is a very active blogger at checkyourlogs.net and is permanently available online for questions from the community. His passion for technology is contagious, improving everyone around him at what they do.

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