Passkeys for macOS and addressing the phishing resistant authentication registration loop
For the last couple of days, I have been working on securing my own tenant and as a result of this, I wanted to enable passkeys for all my test accounts. Passkeys (FIDO2) not only improves productivity and provide better security, but also make the authentication process seamless by eliminating the need for entering a username or password. This can be achieved through both FIDO2 security key and Microsoft Authenticator. Due to this fact, Microsoft and its partners are investing in both synced and device bound passkeys for work accounts. However, and during my own testing, enabling passkey on the user's side can go into a loop when trying to add a passkey in Microsoft Authenticator application. This may not be a case for every tenant, but if you have conditional access policies created that specifically leverage phishing-resistant authentication strength, then you will most likely run into this issue. Luckily there are some work arounds available and require further actions. In this...