Fixed the ‘Content could not be displayed because S/MIME control was not available’ error

  • Because of these problems, users cannot open e-mail or download attachments.
  • The error can also be caused by improper Internet Explorer settings or permission issues.
  • If you are also a victim of this error, here are some troubleshooting steps to help you fix the error on Windows 10, 8, and 7 systems.
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S/mime Download

Please download the IPWorks S/MIME edition that corresponds to your intended development environment from the list below. Each control and library is engineered and designed specifically for each supported platform below.

It’s possible to encounter the “S/MIME control was not available” error in Internet Explorer when using Outlook Web Access (OWA). As a result, users are unable to open e-mail and download attachments from Outlook Web Access.

S/MIME-uncompliant systems cause the error. However, incorrect permission settings or settings in Internet Explorer may also be to blame.

Below are some troubleshooting steps for Windows 10, 8, and 7 users experiencing the “S/MIME control is not available” error.


What causes the “Content cannot be displayed because S/MIME control is not available” error?

What causes the "Content cannot be displayed because S/MIME control is not available" error?

In order to determine how to fix the problem, users have used the list of possible causes to determine what actions they should take. Instead, use the following list to determine your scenario and the appropriate solution.

S/MIME does not recognize Internet Explorer 11 as a browser: This scenario usually occurs after an upgrade and can be easily fixed by adding the OWA page to trusted sites or by looking at compatibility.

The S/mime Message Wasn’t Decrypted Successfully

The S/MIME encryption was not successfully decrypted in OWA. No certificate could be found. Has anyone else experienced this?

S/MIME is not installed correctly: If it is not installed at all or if there is something wrong with the installation, make sure you install it correctly.

S/MIME does not have administrator rights to run Internet Explorer: Some of its features may not work correctly if Internet Explorer is not run as an administrator.


How do I fix the “Content cannot be displayed because S/MIME control is unavailable” error?

Updated: February 2024

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IT administrators and those working in organizations might need to install S/MIME control. In order to install the S/MIME control, your IT administrator will need to issue you a certificate. Otherwise, you will receive the error message.

S Mime For Chrome

Using this method, you will be able to send an email that will self-destruct after sixty seconds of the recipient reading it. The only thing Snapmail does at the moment is encrypt text content. Using another method for images or attachments in your email will require a learning curve.

How do I fix the "Content cannot be displayed because S/MIME control is unavailable" error?

Install S/MIME

As a first step, please ensure that S/MIME is installed and you receive an error message if it does not work. Also, if you update your operating system, its installation may be interrupted or settings may be reset.

Here is what you need to do in order to correct the error:

  1. Connect to Outlook Web Access using Outlook Web Access.
  2. Then click the Show All Settings button at the top right corner of the screen.
  3. To download the S/MIME control, click Settings, then S/MIME, then Download.
  4. Follow the screen instructions after downloading it and completing the installation.
  5. Right-click on the message and select “Run on all websites” when your browser reloads.
  6. You will be prompted to run the security alert.

Add OWA to Trusted Sites and use the compatibility view

Add OWA to Trusted Sites in Internet Explorer to avoid many problems and use compatibility view to make it compatible with different versions of the web browser and OWA. This is the most effective way to fix the error – S/MIME control is not available.

  1. To open Internet Explorer’s Internet options, click on the gear icon at the top of the page.
  2. Click Trusted Sites – Sites on the Security tab.
  3. Select all sites within the area, and remove the server validation required (https:) by pasting the OWA site into the new window.
  4. You can find display settings for compatibility by clicking on the gear icon on the home page.
  5. Click on the “Add” button and paste the same link.

Uncheck the “Internet Options” section.

If the S/MIME control is not working in Internet Explorer, you can disable the option.

  1. You can find advanced options under Internet Options.
  2. Delete the checkmark in the Security section that prevents the disk from storing encrypted pages.

Use Internet Explorer as an administrator

In Internet Explorer, S/MIME requires administrator rights sometimes to work.

  1. Select the exe file’s properties by right-clicking it in C: Program Files: Internet Explorer.
  2. Make your changes by clicking “Shortcut” – > “Run as administrator”.


RECOMMENATION: Click here for help with Windows errors.

Frequently Asked Questions

  1. Go to. Settings -> Mail -> S/MIME.
  2. When you are prompted to run or save the file, select "Run" or "Open" (the choice depends on the web browser you are using).
  3. You may be asked again to confirm that you want to use the software. Select "Run" to continue with the installation.

  1. Install the S/MIME extension.
  2. Set up the S/MIME extension.
  3. Download and install the S/MIME control.
  4. S/MIME settings in Outlook on the Web (OWA).

  1. You can use client certificates, also called "S/MIME certificates" or "personal certificates", to digitally sign or encrypt emails, most email clients.
  2. The certificate is installed on your Mac and appears under My Certificates in Keychain Access.

S/MIME (Secure/Multipurpose Internet Mail Extensions) is a widely used method (or rather protocol) for sending digitally signed and encrypted messages. S/MIME allows encrypted and digitally-signed e-mail messages. It also helps improve privacy and data security (through encryption) for email messages.

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Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog,, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.