> ## Documentation Index > Fetch the complete documentation index at: https://docs.cedarai.com/llms.txt > Use this file to discover all available pages before exploring further. # Customer Users > How to invite, upgrade, and support customers using IAM. ## What is a customer user? A customer user is a standard ARMS user associated with their own organization who is granted access to a subset of your resources (e.g., sites, terminals, tracks, workflows) via IAM policies. ## Create a new customer user Assign to a user group in your road during the invite. They complete signup via the emailed code. Start with limited access to a small set of pages/resources. They can now act on resources allowed by your IAM policy. ## Upgrade a customer user to a normal user Default customer role is removed; default user role is applied. They can act on their own organization’s resources and any shared resources from inviting roads. ## Customer with multiple organizations Add the existing customer to additional user groups from other organizations (e.g., partner sites or operators). They will gain access to those shared resources per policy. ## Manage customer users in the Admin Portal View and manage all users including customers Add customers to groups Grant customer groups access Configure customer-facing access