Managing registered users
You can search the list of end users who are registering or have registered by clicking the link where the number of registered users is reported on the End Users tab. This page is the same as the account-level end users page, except that it applies changes at the policy-level.
From the search results page, you can select an individual user and modify his or her details. You can change a user’s name (but not email address, because that uniquely identifies the user), delete the user, or block the user from accessing the service. Note that the service’s self-registration feature means that deleting a user does not prevent that user from re-registering. However a blocked user is not able to re-register using the same email address.