Go to File > Options. Select Advanced > Link Handling. Note: We have introduced a new way to choose your file open preference. You can now pick between desktop or browser. This enhancement is available starting with build version 2307 (Build 16603.20000). In the Outlook for Windows app. Go to File > Options > Advanced. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.