What is lease invoice numbering nomenclature?

Summary:

We need to understand lease numbering nomenclature of how it is automatically processing the number, and any way we can change it?

Content (please ensure you mask any confidential information):

While processing invoices through lease accounting module to AP module, lease invoices are automatically being generated for the payment schedules which are due for the period selected, we want to understand the navigation of nomenclature setup behind the automatic invoicing and ways through which we can change the current nomenclature and produce our own for ease of use in automatic invoice processing from lease accounting module to AP module. Right now the same is being recorded as "FLA-[lease number]-[chronological numbering]".