Hi @Eaven HUANG
Thank you for reaching us!
I understand that you would like to check the password policy in your organization. For Cloud Only Accounts Microsoft has a pre-defined password policy which can't be changed. The only item you can change is how many days until a password expires and whether or not passwords expire at all.
If the users are unable to change the password, please check the users is on-prem user, if the users is on-premises users see is there any password policy exists in your domain controller for more information please refer the below article.
Azure AD Password PolicyReference: https://learn.microsoft.com/en-us/answers/questions/680844/how-to-make-a-specific-password-expiration-policy
Hope this helps. Do let us know if you any further queries.
Thanks,
Akhilesh.
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