Domian jonin failed when add VM

xuzhang3 Are you using a traditional domain controller in Azure AD?  If so, did you modify the VNET DNS settings to point to your domain controller.

If you are trying to join Azure AD Domain Services with accounts synced from on premise you need to apply the DNS settings to the VNET for Azure ad Domain services (so that VNET is servicing that vnet) although its recommended that you do not deploy WVD directly to the same VNET that is hosting Azure AD DS.  But rather create another peered network and use that.

If you are using Azure AD DS, then you need to make sure you have legacy password has synchronisation or you will get the account is locked message.

https://docs.microsoft.com/en-us/azure/active-directory-domain-services/tutorial-configure-password-hash-sync

You will likely need to change the password for the specific account you want to use to join the domain first after the step above.

I find its easier to deploy a windows 10 VM and just try and join the domain first, fix that and your WVD deployment should work