@VIPIN KUMAR Thanks for posting in our Q&A.
1.Three methods. Please refer to the following link:
https://www.anoopcnair.com/windows-365-cloud-pc-password-reset-options/
Note: Non-Microsoft link, just for the reference.
2.I think they are the same.
3.SSO is related to Azure AD. I'm not familiar with it. Let's wait for the Azure AD support engineer to answer this question.
Hope it will give you some ideas.
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