When a user wants to self register to an Organization, in general they will be provided a URL (e.g. https://sos.nowforce.com). 

When a user signs up he will receive an email with a clickable link that approves the user to login to the System.

Please note that auto-approval is configurable and Organizations can select not to auto-approve users, but to have the Administrator manually approve the user and send the user a notification upon approval.

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