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To run Lync Web App in Internet Explorer, you must enable ActiveX controls.

  1. Click Tools > Internet Options.

  2. Click the Security tab > Custom Level.

  3. Scroll down to ActiveX controls and plugins and click Enable for:

    • Run ActiveX controls and plugins

    • Script ActiveX controls marked safe for scripting

  4. Click OK to close the dialog boxes, and then restart Internet Explorer.

  5. For Internet Explorer 9 and later, you must also disable ActiveXFiltering, if turned on.

Disable ActiveXFiltering

On Internet Explorer 9 and later, if the ActiveX Filtering feature is turned on, it can block Lync Web App from loading correctly. You must disable it to use Lync Web App. If ActiveX filtering is turned on for a website, Internet Explorer displays the null icon in the address bar to indicate that the ActiveX controls have been filtered.

screenshot of the address bar in the internet explorer for a website that has activexfiltering turned on with the null icon highlighted

  1. Click the null icon.

  2. Click the Turn Off ActiveXFiltering button.

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