When a vCenter Single Sign-On user account is deactivated, the user cannot log in to the vCenter Single Sign-On server until an administrator activates the account. You can deactivate and activate accounts from one of the vCenter Single Sign-On management interfaces.
Deactivated 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 deactivate and activate accounts from the vCenter Server Users and Groups page.
Prerequisites
You must be a member of the vCenter Single Sign-On Administrators group to deactivate and activate vCenter Single Sign-On users.