You will need to create a TriNet Cloud account in order to Single Sign On (SSO) into TriNet Perform from TriNet Passport. Creating a TriNet Cloud account will also allow the Admin in both TriNet Passport and TriNet Perform to upload users from TriNet Passport to TriNet Perform.
Go to https://sso.trinetcloud.com > Register.
Enter the information in the required fields. You will need to enter the same email address associated with both your TriNet Passport and TriNet Perform accounts. Then, click Register. If you already created a TriNet Cloud account, you will be notified that the email has been taken.
You will receive an email verification. You must click the "Click here to activate your account" button within the email verification in order to active your TriNet Cloud account.
Now, you will be able to SSO into TriNet Perform from TriNet Passport by logging into TriNet Passport > MySelf > TriNet Perform which is under TriNet Cloud.