When an invoice is entered with an invoice date in the open project accounting and closed accounting periods, the accounting date is the same as the original invoice date, but the project accounting date is the first day of the first open project accounting period. This ensures that the invoice is accounted in the correct accounting period and recognized in the correct project accounting period. https://docs.oracle.com/en/cloud/saas/project-portfolio-management/20c/oapfm/manage-project-invoices.html#OAPFM2355911

The option that allows you to achieve this requirement is Appearance Page. This page allows you to create and apply a new theme for the application user interface by selecting various options such as colors, fonts, logos, etc. You can also preview and publish your theme changes using this page. Structure Page is not an option that allows you to achieve this requirement. This page allows you to customize the structure and layout of the application user interface by adding or removing components such as regions, tabs, fields, etc. Setup and Maintenance Work Area is not an option that allows you to achieve this requirement. This work area allows you to perform various setup tasks for implementing and configuring Oracle Fusion applications using predefined templates and spreadsheets. User Interface Text is not an option that allows you to achieve this requirement. This option allows you to customize the text and labels of the application user interface by editing or translating them using various tools such as Text Editor or Translation Workbench. https://docs.oracle.com/en/cloud/saas/project-portfolio-management/20c/oapfm/set-up-project-financial-management.html#OAPFM2356331

Ref: https://docs.oracle.com/en/cloud/saas/project-portfolio-management/19a/oefpp/toc.htm

Ref: https://docs.oracle.com/cd/E17904_01/doc.1111/e14431/managing.htm#APMAG3333 Fusion Middleware Administrator,s Guide for Authorization Policy Manager Managing Security Artifacts This chapter describes the procedures an administrator follows to manage application-specific security artifacts, view the external role hierarchy, manage the application role hierarchy, and manage the many-to-many mapping of application roles to external roles from both the application and the external role point of view.
This chapter is divided into the following sections:
Managing Application Security Artifacts
Viewing the External Role Hierarchy
Managing the Application Role Hierarchy
Mapping Application Roles to an External Role
Mapping External Roles to an Application Role
Role Mapping Policy
A Role Mapping Policy is used to determine what external subjects (users, groups or External Roles) are assigned to the applicable Application Role. The Application Role, when referenced in an Authorization Policy, defines the principals affected by the Authorization Policy. Role Mapping Policies may also include conditions Oracle Identity Manager - Not used for mapping application roles to external roles How do Users Interact with Oracle Identity Manager?
Oracle Identity Manager provides an end-user interface, called the Identity Self Service console, and a system administrator interface, called the Identity System Administration console. Both end-users and system administrators use the web browser to log on to Oracle Identity Manager. Oracle Identity Manager (OIM) OIM provision users, roles, and defines what a user can do in Oracle Cloud Duty Roles are mapped to jobs and assigned access privileges (Data Security)

Ref: https://docs.oracle.com/en/cloud/saas/project-portfolio-management/18c/oapfm/project-costing-configuration-define-project-costing-integrations.html#OAPFM174886 How can I validate distribution sets for projects information?
Oracle Fusion Projects performs validations on Oracle Fusion Payables distribution sets for payables invoices at the time you create the actual distribution set lines. It validates the project and task number during the invoice validation.
Distribution sets are typically used on recurring transactions, and the associated project does not have transaction controls. When you create a distribution set in Oracle Fusion Payables, the distribution set line is not validated against the project transaction controls in Oracle Fusion Projects because you do not enter an expenditure item date, which is required for transaction control validation. The expenditure item date is not provided because you use the distribution sets for an indefinite period of time.