Enterprise Plus edition user licenses

Hi

A client of mine has has 3 server instances of BF:
1 instance of Enterprise Plus.
2 instances  of Enterprise.

I know that the Enterprise plus edition supports up to 250 concurrent connections but doesn't really use any kind of user licenses.

My client is asking if there is a way to transform those 250 concurrent connections into real licenses keys so they can share user keys across all their BF servers.

I don't think this is supported but I wanted to find out for sure.


Thanks

Andy