How to check that edge browser vision 108 above has enabled ECH(Encrypted ClientHello)?

Hi @chinchengi ,

In Edge 108, a group policy called EncryptedClientHelloEnabled has been introduced to control ECH and replaced the old experimental feature. You can have a try. If you are not familiar with group policy configuration in Edge, please read this guide.

To test ECH, you can use defo. If ECH is successfully configured, the result should be like the screenshot below.

UPDATE: After another investigation, the policy EncryptedClientHelloEnabled is only used when you want to disable ECH. Therefore, in order to enable ECH, you need this command line option:

--enable-features=EncryptedClientHello

To use command line options, please right click on Microsoft Edge --> Properties --> Shortcut --> Target.

As an example, Target should look like: "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --enable-features=EncryptedClientHello.

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Best Regards,

Shijie Li