VDA registration can be configured using:
Group Policy Object (GPO): Policy-based configuration using LGPO or GPO.
Organizational Unit (OU) based Controller discovery: Legacy OU discovery method.
MCS-based PERSONALITY.INI: Using the personality.ini file for MCS-based deployments.
These methods ensure that the VDA has accurate and current Controller or Cloud Connector information as Controllers are added, moved, and removed in the site1.