If you want to self register to an Organization, you are given a URL (for example, https://sos.nowforce.com). 

When you sign up to this URL, you will receive an email with a link that approves your login to the system.

Note:  Organizations can choose if they want to allow self registration, or only allow administrators to register new users. If your organization does not allow self-registration, you are only sent a notification to login to the system after registration by the administrator.

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