We have to create real-time bridges between the two (Navision & Mainframe). For example, AR invoices created on the Mainframe need to be copied to Navision. Cash Application transactions done in Navision need to be copied to the mainframe. We are looking to use BizTalk for that, since the record transfer need to be instantaneous and immediate but as we understand cash transactions and g/l entries are not being handled by it Navision Commerce Gateway already has 16 XML schemas (Purchase & sales Documents and Item Catalog Import & Export) . Is it possible to create new schemas for G/L and other transactions. Is there any Tool/Document available with Microsoft.