You have a Microsoft 365 subscription and are planning to install AD Connect to support an Active Directory hybrid identity solution. Your company are using a 3rd party authentication solution that requires smartcards. You need to choose an authentication method for the Azure AD hybrid identity solution. What do you do?
Solution: You configure Password hash synchronization

Answer options:

A.Yes
B.No

Correct Answer: B 
Password hash synchronization is not compatible with 3rd MFA solutions or smartcards. 
Password hash synchronization synchronizes your AD DS user accounts with Microsoft 365 and manages your users on-premises. Hashes of user passwords are synchronized from your AD DS to Azure AD so that the users have the same password on-premises and in the cloud. 
Reference:
To know more about Password hash synchronization, please refer to the link below: 

https://docs.microsoft.com/en-us/azure/active-directory/hybrid/whatis-phs