Using Windows 10 1703, it seems to be impossible to persistantly use a combination of IE11 and Outlook 2010.

Even if both applications are set as default, if you click an HTTP link in an Outlook email, the user is asked to choose a browser. Even if the user chooses to permanently save the setting, the dialog comes up again.

Solution

Create a registry entry:

If key “shell” does not exist, create it. Do the same for key “opennew”.

Then edit the “Default” value for key “opennew”:

Also make sure you set the associations via the “old” way, Control Panel -> Default Associations, not via the “modern” menu.

Reference 1

Reference 2

 

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