Cerficate Based Authentication with ADFS works in Safari for iOS, but not Chrome or Edge in iOS.

Question

We have had Certificate Based Authentication (CBA) working on iOS for email, etc. If the user opens portal.office365.com and gets redirected to our ADFS they eventually get "No valid client certificate found in the request." We have forms authentication disabled for Extranet so we can only use certificates.

For some reason Chrome and Edge aren't submitting the certificate. Everything works fine when using Safari.

This issue started about two weeks ago (we think). We are thinking either an iOS update broke it or a windows update. Anyone else seeing this?

Answer 1

Hi @The Squirrel ,

According to the latest modification of CBA documentation, only Safari has a perfect support for CBA on iOS devices.

As to Edge, only Edge with profile, when users add account and logged in a profile support CBA. You'll need to be logged into a profile.

As to Chrome, unfortunately there seems to have been no solution yet because Chrome does not have MSAL integrated into it. For more information, you can refer to this answer by Vimala_Ranganathan.

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Shijie Li