“Allow sites to ask to become default handlers for protocols”

Louis Comolli 0 Reputation points
2026-04-17T16:50:51.7666667+00:00

Yes, I need to get my Nextiva phone to be able to dial automatically once I click the number

Microsoft Edge | Open the browser | Windows 10
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  1. Thomas4-N 21,440 Reputation points Microsoft External Staff Moderator
    2026-04-18T09:54:45.12+00:00

    Hello Louis Comolli,

    For clicking phone numbers in Edge to trigger a call through Nextiva, make sure the tel: protocol is mapped to the Nextiva app in Windows. You can check this by going to Settings > Apps > Default Apps, scroll down and click Choose defaults by protocol, then find TEL and set it to your Nextiva app.

    In Edge, also make sure the setting is enabled: go to edge://settings/content/protocolHandlers and confirm "Allow sites to ask to become default handlers for protocols" is turned on.

    For anything beyond that — like how Nextiva handles incoming tel: links or its click-to-dial configuration — that would be best addressed by Nextiva's support, since it's their app that ultimately processes the call.

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  2. AI answer

    2026-04-17T16:51:07.15+00:00

    To let phone numbers in Microsoft Edge automatically open the Nextiva app (using a protocol like tel: or a custom Nextiva protocol), configure protocol handling in Edge and ensure the protocol is trusted/handled on Windows.

    1. Make sure Nextiva is installed and registered as a handler for phone links
      • Install or repair the Nextiva softphone/desktop app.
      • During or after installation, ensure it registers itself as the default handler for tel: (or its own custom protocol, for example nextiva:). This is done by the app’s installer via Windows protocol registration.
      • If Nextiva has a setting like “Make this my default calling app” or “Handle click‑to‑dial links,” enable it.
    2. Enable protocol handling in Edge for click‑to‑dial
      • In Edge, open Settings → Cookies and site permissions.
      • Look for Handlers or similar (this controls “Allow sites to ask to become default handlers for protocols”).
      • Turn on the option that allows sites to ask to handle protocols.
      • When a site tries to use tel: (or the Nextiva protocol), Edge will show a prompt asking whether to open the external app.
    3. Use the external protocol dialog to remember the choice (managed environments)
      • If managed by an organization, admins can control the “Always allow this site to open links of this type” checkbox in the external protocol dialog using the ExternalProtocolDialogShowAlwaysOpenCheckbox policy.
      • When this policy is enabled, the user can select Always allow so future phone-number clicks open Nextiva without prompting.
      • Policy details (for admins):
        • Group Policy path: Administrative Templates/Microsoft Edge → Show an "Always open" checkbox in external protocol dialog.
        • Registry (Windows): HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge → ExternalProtocolDialogShowAlwaysOpenCheckbox (REG_DWORD, 1 = enabled).
    4. Test with a phone link
      • On a web page, click a phone number that is formatted as a link (for example, tel:+14255550146).
      • Edge should show an external protocol prompt offering to open Nextiva.
      • Choose Nextiva and, if available, check Always allow so future clicks dial automatically.

    If the external protocol prompt never appears, the Nextiva app may not be correctly registered as a protocol handler on Windows; reinstalling or updating the app is required so Windows and Edge recognize it as the dialer.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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