Office 365: Installing Outlook add-in for yourself
You can install the add-in directly from the AppSource store listing page: Yoxel Salesforce Add-On
Alternatively, in Outlook (desktop) click the Get add-ins ribbon button:
Look for 'Yoxel' in the search box and click 'ADD'. The add-in should get installed!
Close the popup and check the main ribbon menu in Outlook.
Click Open Yoxel to open the addin.