Hi @Irene Barranco  ,

If you are looking for Accessing the Employee center itself then , the users just need to be an active user in your system. They don't need any special roles to use the portal.

If they will be working within the portal, then yes, they may need certain roles. But any active normal employee will have access to the portal, as long as their account in SN backend is active.

Client roles define access within the application. ServiceNow provides these roles and modifying them is not recommended. These roles can be added to other roles or groups. There are two groups:

• HR fulfillment support: sn_core_hrsm
• HR Service Portal: sn_core_hrsp

Also, Refer to this doc as well to understand Client roles : https://docs.servicenow.com/en-US/bundle/sandiego-employee-service-management/page/product/human-res...