We've added performance improvements to batch postings of source documents in order to run more efficiently. This feature initially will only affect free text invoice batch posting with more source documents to be supported in future releases. When this feature is enabled, batch posting is split into smaller units of work preventing system degradation and lessening the chance of issues due to database disconnections. Printing, settlement, payment posting at time of invoice posting and localizations are not supported by this feature at this time. When the feature is enabled, posting free text invoices that are subject to printing, settlement, payment posting and localizations will use the legacy posting process.