Make sure that the value of the String (Default) is “ htmlfile“.Locate, and then click the following registry subkey: HKEY_CLASSES_ROOT \.html.In the Open box, type regedit, and then select OK.Select OK, and close the Default Programs dialog box.Scroll back up to the top of the default programs list and highlight Internet Explorer and select Set this program as default.In the Programs list, select Microsoft Outlook > Set this program as default.In Internet Explorer, Select Tools > Internet Options.In the Reset Internet Explorer Settings window, select Delete personal settings > Reset.How To Fix Hyperlinks Not Working In Outlook After some digging, I found the steps needed to resolve this issue. In my case, my default browser was set to Firefox (recently upgraded from the x86 to the 圆4 version, which might have been when the problem started). While there are security policies in place, the ability to click on a hyperlink is not included in them, so the issue had to be from something else. For more info, please contact your help desk”. Please contact your system administrator” or “Your organization’s policies are preventing us from completing this action for you.
I recently ran into an issue where Outlook 2016 on Windows 10 was giving me one of these errors whenever I would try to click on a link: “This operation has been cancelled due to restrictions in effect on this computer.