[ServiceNow] Can we provide link to our existing KB?

If the requirement is to provide the link inside the ServiceNow KB article, follow the below procedure

1) Navigate to the Knowledge article.

2) In the HTML editor, click the Insert/Edit link icon.

3) Enter the complete URL in the text box (including http:// or https://)

4) Choose Target: New window (_blank). 

5) Click OK.

However, if the requirement is that upon clicking the KB article it should be routed to the external KB without 

opening the article in ServiceNow then scripting would be required to achieve the same.