Attachment Issues

How to Fix Cannot Open or Run a Macro-Enabled Email Attachment

Anum Mushtaq Oct 16, 2026 869 views

Question details

The user is unable to open or run a macro-enabled attachment received via email due to security blocks, policy changes, or file restrictions.

How to Fix Cannot Open or Run a Macro-Enabled Email Attachment

Product: Email Client / Office Software
Device & OS: not provided
Scenario: Attempting to access and execute a macro-enabled file (such as .xlsm or .docm) directly from an email message.
Observed behavior: The attachment is blocked from opening, or the embedded macros are disabled and refuse to run even when instructed.

Before you start

Verify that the email sender is trusted and that you were expecting this specific attachment, as macro-enabled files can sometimes contain malicious code.

Solution 1Recommended

Save the Attachment Locally and Unblock the File

Downloading the file to your computer and removing the 'Mark of the Web' security block is the most reliable way to restore access to the attachment.

Modern operating systems and Office programs apply a security tag to files downloaded from the internet or received via email. This tag automatically blocks macros from running. You must save the file locally and manually unblock it to bypass this security measure.

Save to a local folder

Right-click the macro-enabled attachment in your email client and select 'Save As'. Choose a local folder on your computer, such as your Desktop or Documents, and save the file.

Open file properties

Navigate to the folder where you saved the file. Right-click the file icon and select 'Properties' from the context menu.

Unblock the file

In the General tab, look for a 'Security' section at the very bottom. Check the box labeled 'Unblock', then click 'Apply' and 'OK'.

Open and test

Double-click the unblocked file to open it in your Office application and verify that the macros can now run properly.

Save the Attachment Locally and Unblock the File

File Trusted: Unblocking the file successfully removes the internet security barrier, signaling to your system that the file is safe to execute.

Solution 2

Adjust Macro Security Settings in Trust Center

If the file is already unblocked but macros remain disabled, your Office application's security settings might be restricting all macro execution.

Solution 3

Check Antivirus Software and IT Network Policies

Strict email filters, third-party antivirus software, or corporate network policies can aggressively block macro-enabled files from being opened.

Secure Office Alternative

Open and Manage Office Attachments Securely with WPS Office

WPS Office provides a highly compatible and secure environment to open, view, and edit email attachments. Its intuitive interface lets you easily manage document security while maintaining seamless compatibility with complex Microsoft Office file formats.

1. Install the software: Download and install the free version of WPS Office on your computer.
2. Download the attachment: Save the problematic email attachment directly to a local folder on your hard drive.
3. Open securely: Right-click the saved file, select 'Open with', and choose WPS Office to safely view and edit the document.

Fully compatible with Microsoft Excel, Word, and PowerPoint formats (.xlsm, .docx, .pptx).Built-in document security features to safely handle unknown email attachments.Lightweight installation and incredibly fast loading times for heavy files.Free basic features with an intuitive, tabbed user interface.

microsoft office alternative - wps office

Frequently Asked Questions

Why are macro-enabled attachments blocked by default?

Macro-enabled files (like .xlsm or .docm) can contain embedded scripts that run malicious code or viruses. Email providers and Office applications block them automatically as a precaution to protect your system from potential security threats.

What is the Mark of the Web (MOTW)?

The Mark of the Web is a hidden security attribute applied by Windows to files downloaded from the internet or saved from email clients. It forces Office applications to open the file in Protected View and strictly blocks macros until you manually unblock the file in its properties.

Can I run macros without unblocking the file first?

Typically, no. Recent security updates in Microsoft Office require you to explicitly unblock the file via the Windows Properties menu before macros can be executed, even if you try to click 'Enable Content' inside the app.

What should I do if the 'Unblock' checkbox is missing in file properties?

If the 'Unblock' option is missing, it means the file is either not restricted by the Mark of the Web, or your organization's IT policy is enforcing a deeper restriction. Ensure the file is saved to a local drive rather than a network share, or consult your IT administrator.

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