Case Access Group

Case access groups enable you to make access restrictions to users.

The access restrictions work as follows:

Basic rule (valid for all users, i. e., both call center assignees and non assignee users):
Users should always be able to view the cases/tasks created by them or last modified by them 

Users belonging to the case access groups with the following access restrictions will be able to view the following cases:

Access restriction: None (typically applicable to a support consultant in the call center)
    Case type Global – All cases
    Case type Customer – The cases registered with the customer to whom the user belongs.
    Case type Local – The cases owned by the support organization to which the user belongs.

Access restriction: Local (typically applicable to a partner)
    Case type Global – The cases owned by the support organization to which the user belongs.
    Case type Customer - The cases registered with the customer to whom the user belongs.
    Case type Local – The cases owned by the support organization to which the user belongs.

Access restriction: Customer (typically applicable to a customer)
    Case type Global – The cases registered with the customer to whom the user belongs.
    Case type Customer - The cases registered with the customer to whom the user belongs.
    Case type Local – The cases registered with the customer to whom the user belongs.

In addition, there is a system parameter Registration By Assignee Only, with the values Yes and No, registered on the System LU Values/Object Property tab (Object LU: CcConfiguration). The default value is No, which means that the Foundation users not registered as call center assignees can also create cases.