Manually assign PO Numbers

Summary

Our client has a requirement to manually assign their own PO numbers like you can do in EBS, is this possible in the cloud?

Content

Our client has a requirement to manually assign their own PO numbers like you can do in EBS, is this possible in the cloud? Purchasing will be the financial system of record, but an external contracting system is used, and the PO number needs to be manually entered in Cloud in order for the systems to be in sync. The users also have a requirement to match to the actual PO number, which is another reason they need to be able to manually enter PO numbers. If manual numbering is not allowed in Cloud, are there any known solutions on