asterisk users - Feb 2014 - OT: Support of callto or tel protocols in MS Office ?

Hello,

Has someone successfully configured support of either callto or tel
protocol in MS Office in general or MS Office Online's Outlook specifically
?

(I'm referring here in Outlook client embedded in MS Office cloud service).

If positive, what are the basic steps to enable such feature (clicking on a
contact phone number triggers whatever program is attached to tel/callto
protocol in Windows Registry) ?

Regards
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