Encryption and multi-factor authentication are security options to manage sub-folder security in a volume.
In UMC, click File Access Protocols > NCP.
Click the Search icon and specify the server name.
or
Click Browse and select Server Type to list their associated servers. Select the required servers from the list, and then click APPLY.
Select the NCP share, click More Options icon, and then select Sub-folder security.
In Sub-folder security, select the folder, click More Options icon, and select Encryption or Multi-factor authentication options to modify the security.
This can be performed on multiple sub-folders at a time.