Before implementation an employee (a requester) fulfilled an excel document of expense report by hand, had it printed and brought it to an accounting department with other supporting documents.
All abroad expenses were converted into dollars according to the corporate exchange rate by a requester itself.
An accounting department checked the documents out and in case they were wrong gave them back to the requester. If the documents were correct the accounting department sent them to a financial controller for visaing. After the accounting department added the docs to SAP so that the requester got its expense reimbursement.
As a result, it caused following difficulties:
Every employee participating in the process is working in the single Power App built into Microsoft Teams: