When a vCenter Single Sign-Onuser account is disabled, the user cannot log in to the vCenter Single Sign-On server until the account is enabled by an administrator. You can disable and enable users from the vSphere Web Client interface.
Disabled user accounts remain available in the vCenter Single Sign-On system, but the user cannot log in or perform operations on the server. Users with administrator privileges can disable and enable users from the vCenter Users and Groups page.
Prerequisites
You must be a member of the vCenter Single Sign-On Administrators group to disable and enable vCenter Single Sign-On users.