Add custom button in power portal list and open external site on click
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You can open external URL by specifying URL option in grid configuration in a List in power portal. Go to Portal Management Model driven app and navigate to options, click on create. It will add a create section and in the target type choose URL. Mention the target URL in the box such as “https://logyscal.com/”.
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Save the List and Clear Cache in Power Portal. Navigate to the list you will see the new button to link external page.
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Hope this helps
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