"People in my organization have already registered. How do I create an account to be joined with their organization?"
You can add new users to PMP Clearinghouse that will have the same rights and access to file submission and status. This allows data submitters to create accounts to be used for a backup individual. You can add a user by going to the section titled User and selecting Add User.
More information on adding users to your account, adding states to your account and adding a SFTP to a registered account, including a complete walkthrough of all steps involved, is available in Section 8. User Profile, of the state PMP AWARxE Data Submission Guide.