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Need help with Virtual Host deployment
May be the issue, if you've not done it.
If you are using Azure ADDS for the domain join of your VM, you need to make sure that you change the password of the account that is being used for the domain join (and it also needs to be in the correct group). That password change will then sync from Azure AD to AADDS.
If your organization has cloud-only user accounts, all users who need to use Azure Active Directory Domain Services must change their passwords. A cloud-only user account is an account that was created in your Azure AD directory using either the Azure portal or Azure AD PowerShell cmdlets. Such user accounts aren't synchronized from an on-premises directory.
https://docs.microsoft.com/en-us/azure/active-directory-domain-services/active-directory-ds-getting-started-password-sync