Different Methods About Enable DNFS On Windows Are Introduced From Documents (Doc ID 3008959.1)

Oracle® Database Database Installation Guide 19c for Microsoft Windows E96293-09
https://docs.oracle.com/en/database/oracle/oracle-database/19/ntdbi/enabling-direct-nfs-client.html#GUID-85684A35-5528-4E3E-AB7E-8ACCFF85FDC3

Enabling Direct NFS Client
To enable Direct NFS Client, you must add an oranfstab file to the Oracle_home\dbs directory and modify the related DLL files used by the Oracle Database software.
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 1.Create an oranfstab file.
 2.Replace the standard ODM library, oraodm19.dll, with the ODM NFS library
   Oracle Database uses the ODM library, oranfsodm19.dll, to enable Direct NFS Client. To replace the ODM library, complete the following steps:
      a.Change directory to Oracle_home\bin.
      b.Shut down the Oracle Database instance on a node using the Server Control Utility (SRVCTL).
      c.Enter the following commands:
            copy oraodm19.dll oraodm19.dll.orig
            copy /Y oranfsodm19.dll oraodm19.dll
      d.Restart the Oracle Database instance using SRVCTL.
      e.Repeat Step 2.a to Step 2.d for each node in the cluster.

Oracle® Grid Infrastructure Installation and Upgrade Guide 19c for Microsoft Windows E96354-06
https://docs.oracle.com/en/database/oracle/oracle-database/19/cwwin/enabling-direct-nfs-client.html#GUID-85684A35-5528-4E3E-AB7E-8ACCFF85FDC3

8.6 Enabling Direct NFS Client
You enable Direct NFS Client by running the enable_dnfs.bat command

  1.Shut down the Oracle Database instance.
  2.Create and configure an oranfstab file in ORACLE_HOME\dbs.
  3.Set ORACLE_HOME to Oracle home for which the Direct NFS Client must be enabled.
  4.Change directory to ORACLE_HOME\bin.
  5.Run the batch file enable_dnfs.bat.
  6.Restart the Oracle Database instance.

For Oracle RAC, repeat the above procedure on all nodes in the cluster.