Why is my hyperlink not working?

The main reason of hyperlinks not working in Outlook is the default Internet browser not registered (properly) in your operating system. Typically, this issue comes up after uninstalling Google Chrome or changing the default browser from Internet Explorer to either Chrome or Firefox.

For More Information Please Refer: https://www.ablebits.com/office-addins-blog/2014/01/16/hyperlinks-not-working-outlook/