Microsoft S/MIME

Performs S/MIME digital signing, encryption and decryption for email messages in Outlook on the web.

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Microsoft S/MIME is available to install from Edge Add-on Store and for download from this page. It has 895,397 weekly active users The latest version is 20.20.514.1, and it was published 3 months ago.

All available versions

You can find the current and older versions of Microsoft S/MIME here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version. Subscribe to the paid version of EdgeStats to access more available versions.

How to install Microsoft S/MIME from a CRX file

Option 1: The easy way (for Windows users only)

1. Download and run allow-chrome-stats.reg file on your PC. This method will allow you to install Chrome extensions directly from edge-stats.com in one click. You only need to do this once!
2. Type in chrome://restart in the URL bar to restart the browser for the changes to take effect.
3. Download and install the Microsoft S/MIME CRX file

Option 2: Advanced method

1. Download Microsoft S/MIME CRX file
2. NOTE: Sometimes the browser may block downloading / installing CRX file from outside the Edge Add-on Store. If so, you may need to use option 1, or download the ZIP file instead.
3. In the URL bar, go to edge://extensions
4. Enable Developer mode
5. Drag and drop the downloaded Microsoft S/MIME CRX file into the Extensions page
6. When prompted, click Add extension to install Microsoft S/MIME.

How to install Microsoft S/MIME from a ZIP file

1. Download and unpack the Microsoft S/MIME ZIP file to a directory of your choice.
2. In Edge browser, go to edge://extensions
3. Enable Developer mode.
4. Click on the Load Unpacked button.
5. Select the directory of with the unpacked Microsoft S/MIME ZIP file from step 1. Microsoft S/MIME is now installed on your browser.