Zoho Projects provides an option to import users / accounts from Zoho CRM and mail Suite. From CRM now you can import your project / client users for your project portal. This way you can quickly import / add bulk users with ease.

Zoho Projects provides an option to import users / accounts from Zoho CRM and mail Suite. From CRM now you can import your project / client users for your project portal. This way you can quickly import / add bulk users with ease.
Import from Zoho CRM | Import from Zoho Business | Import MS Projects