(This guide is also available in video format here)
Step 1: Click Get Add-ins button
In Home tab > Click Get Add-ins button to load Add-ins popup.

Step 2: Confirm removing action
- Go My add-ins tab
- You can see installed plugin – Secured Signing for Outlook
- Click … to open extra menu of this plugin
- Click Remove menu item
- At end, click Close button to return
