How to add an HTML signature file in Outlook 2013

So you’re staring at your fancy new HTML email signature and wondering how on earth to install it to Microsoft Outlook. Well, we’re here to help.

Frustratingly Microsoft has made it complicated if you want to use a custom html email signature in Outlook 2013. Fortunately, we have you covered. Here’s the step-by-step process helping you install your fancy new signature.

1. Enable hidden files

Open up your File Explorer (Windows Key + E).

Double click on your hard drive (Usually OS (C:) for most users).

Click on the View tab at the top.

At the top-right, click on Options, then select “Change Folder and Search Options”.

The Folder Options dialog box should have popped up. Click on the View Tab.

Mark the option that says “Show hidden files, folders, and drives”.

Make sure the option that says “Hide extensions for known file types” in unchecked.

Hit the Apply button, then hit Ok.

2. Install the Signature

Make sure you still have the File Explorer open on your hard drive. (Windows Key + E then open C:).

Navigate to Users/[Your User Name]/AppData/Roaming/Microsoft/Signatures.

Drop your .htm signature file into this folder.

If your HTML file ends with the file extension .html then it needs to be changed to .htm. Right-click on your HTML file and select Rename, then change the file extension to .htm

Open Outlook 2013. If you already had Outlook running you may need to close it and re-open.

Click on File, then Options, then Mail, then click on the Signatures button.

You should see your new signature file in the list in the “Select signatures to edit” box.

The name of the signature will be the same as your HTML file name. Your signature may not look correct in the preview area, but do not worry! This is perfectly normal so don’t try to make any alterations.

Make sure you choose your signature in the “New messages” and “Replies/forwards” select menus.

Click Ok until you are all the way out of the pop-ups.

Click New Email to view your new signature.

3. That's it

Congratulations, you’re now level expert. Enjoy.