Does anyone know what triggers MS Edge to not open a specific web page/site, but instead prompt the user to open the site in internet explorer?
The message says:
This website needs Internet Explorer
This website uses technology that will work best in Internet Explorer.
It is not possible to proceed using Project Spartan.
in the internet Explorer compatibility setting, you will see an option "Let Internet Explorer open sites in Microsoft Edge" , the default value is Incompatible Sites only(Recommended). You can change it to Never. 5. Open your Internet Explorer browser and check again if it opens the Edge.
You can disable this behaviour from Edge by going to Settings > Default browser > Let Internet Explorer open sites in Microsoft Edge and setting it to "Never". No need for disabling all addons or modifying the registry. You might need to restart IE after changing the setting for it to take effect.
Alternative methods to launch Internet Explorer mode in EdgeChoose Settings, then Default browser. From here, you can: Make Edge your default browser (if not already) Allow IE to automatically open sites in Edge (Never, Incompatible sites only, or Always)
It is because the website is using some legacy technology. Microsoft Edge will automatically determine this and prompt the user. You'll need to figure what legacy components are there in Internet Explorer and convert those pieces to modern web standards.
There is no rule set based on the content of the page to cause this prompt.
The prompt is controlled using the "Compatibility List" which is a cloud-hosted list downloaded by the MS Edge browser periodically. It is very similar to the CV list in IE.
In most cases we are working with the sites on that list to migrate to newer technologies at which time they'll be removed from the list.
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