To transfer the schema master role in Active Directory, follow these steps:

1. Transfer the FSMO (Flexible Single Master Operations) by using the ntdsutil command-line tool.
2. Ensure that the process is being carried out on a healthy domain controller. This is a very important step.
3. Backup the Active Directory database prior to initiating the transfer process.
4. Initiate the transfer process using the ntdsutil command
5. Verify the transfer process by using the ntdsutil command.