Hi,
Have you tried setting internet explorer as the default browser to see whether this issue continues?
Did you ever install other web browser and then uninstalled it? Maybe Chrome or Firefox? If this is the case, you may try the Method 3 in the following Microsoft KB article and see whether it helps:
https://support.microsoft.com/en-sg/help/310049/hyperlinks-are-not-working-in-outlook
Besides, the article below listed some other methods you can try to fix the issue. If above doesn't help, please also refer to the following article and try the steps:
https://www.slipstick.com/problems/this-operation-has-been-cancelled-due-to-restrictions/
(Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)
Regards,
Steve Fan
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