Changing the default app used to open tel: links on Windows

Earlier this morning I had a missed call notification in Outlook. I clicked the number, Windows asked me which app I wanted to open that type of link (a tel: URI) and I clicked the wrong option. All of a sudden I had phone numbers opening in the Skype Windows 8 app rather than in my Skype for Business client (previously the Lync client).

It turns out that it’s a relatively simple change to make but it’s not necessarily obvious that the UI to do this is the one to change file type associations (this is a link, not a file…).

  1. In Control Panel go to Default Programs and then Set Default Programs (the quickest way is to hit the Windows key and type “Default Programs“).
  2. Scroll down to Lync (desktop). Despite the name, this is the Skype for Business desktop client.
  3. Select Lync (desktop) and click Chose defaults for this program:
  4. You’ll see that the URL:Tel Protocol entry is not checked, because it’s associated with Skype:
  5. Select the Checkbox next to TEL and click Save:
  6. If you look at the Skype program associations, TEL will now be showing as defaulting to Skype for Business (desktop):

There’s more information in Paul Thurrott’s Windows 8 Tip on Changing File Associations.

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