Numbering Sequence for Purchase Transactions

You have found the right area with the coordinator group to control the sequence. That is the only control.  I don’t know this would be any different with a different client as it is a database setting.  If you want to embed intelligence into the numbering sequence, you would need to create a custom table to hold the information for the numbering and then a custom event to load in the value for the purchase order number prior to saving the record.  

@tecprabun we got a similar request recently and thought of having next value for Purchase Agreements and POs here under the Enterprise Identities Series through a couple of custom rows. Then again facing the challenge due to the inability to have prefixes. We are using IEE only.