Using New Outlook on Windows for professional communication and productivity
You could further verify whether Google Chrome has been set as the default browser by going to:
Settings > Apps > Default apps > Google Chrome
In particular, please check whether the HTTPS protocol is assigned to Google Chrome, as shown below.
I have tested this in my environment, and hyperlinks in New Outlook open successfully in Google Chrome when it is configured as the default browser.
I hope this information provides some additional insight. If you have any updates or further findings, please feel free to share them.
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